256493280

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{43}}^2$

素因数の和:138

約数の個数: 216

約数和(自身を含む): 878700312

約数和(自身を除く): 622207032

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 32, 34, 40, 43, 48, 51, 60, 68, 80, 85, 86, 96, 102, 120, 129, 136, 160, 170, 172, 204, 215, 240, 255, 258, 272, 289, 340, 344, 408, 430, 480, 510, 516, 544, 578, 645, 680, 688, 731, 816, 860, 867, 1020, 1032, 1156, 1290, 1360, 1376, 1445, 1462, 1632, 1720, 1734, 1849, 2040, 2064, 2193, 2312, 2580, 2720, 2890, 2924, 3440, 3468, 3655, 3698, 4080, 4128, 4335, 4386, 4624, 5160, 5547, 5780, 5848, 6880, 6936, 7310, 7396, 8160, 8670, 8772, 9245, 9248, 10320, 10965, 11094, 11560, 11696, 12427, 13872, 14620, 14792, 17340, 17544, 18490, 20640, 21930, 22188, 23120, 23392, 24854, 27735, 27744, 29240, 29584, 31433, 34680, 35088, 36980, 37281, 43860, 44376, 46240, 49708, 55470, 58480, 59168, 62135, 62866, 69360, 70176, 73960, 74562, 87720, 88752, 94299, 99416, 110940, 116960, 124270, 125732, 138720, 147920, 149124, 157165, 175440, 177504, 186405, 188598, 198832, 221880, 248540, 251464, 295840, 298248, 314330, 350880, 372810, 377196, 397664, 443760, 471495, 497080, 502928, 534361, 596496, 628660, 745620, 754392, 887520, 942990, 994160, 1005856, 1068722, 1192992, 1257320, 1491240, 1508784, 1603083, 1885980, 1988320, 2137444, 2514640, 2671805, 2982480, 3017568, 3206166, 3771960, 4274888, 5029280, 5343610, 5964960, 6412332, 7543920, 8015415, 8549776, 10687220, 12824664, 15087840, 16030830, 17099552, 21374440, 25649328, 32061660, 42748880, 51298656, 64123320, 85497760, 128246640, 256493280]

約数ペア:

[(1, 256493280), (2, 128246640), (3, 85497760), (4, 64123320), (5, 51298656), (6, 42748880), (8, 32061660), (10, 25649328), (12, 21374440), (15, 17099552), (16, 16030830), (17, 15087840), (20, 12824664), (24, 10687220), (30, 8549776), (32, 8015415), (34, 7543920), (40, 6412332), (43, 5964960), (48, 5343610), (51, 5029280), (60, 4274888), (68, 3771960), (80, 3206166), (85, 3017568), (86, 2982480), (96, 2671805), (102, 2514640), (120, 2137444), (129, 1988320), (136, 1885980), (160, 1603083), (170, 1508784), (172, 1491240), (204, 1257320), (215, 1192992), (240, 1068722), (255, 1005856), (258, 994160), (272, 942990), (289, 887520), (340, 754392), (344, 745620), (408, 628660), (430, 596496), (480, 534361), (510, 502928), (516, 497080), (544, 471495), (578, 443760), (645, 397664), (680, 377196), (688, 372810), (731, 350880), (816, 314330), (860, 298248), (867, 295840), (1020, 251464), (1032, 248540), (1156, 221880), (1290, 198832), (1360, 188598), (1376, 186405), (1445, 177504), (1462, 175440), (1632, 157165), (1720, 149124), (1734, 147920), (1849, 138720), (2040, 125732), (2064, 124270), (2193, 116960), (2312, 110940), (2580, 99416), (2720, 94299), (2890, 88752), (2924, 87720), (3440, 74562), (3468, 73960), (3655, 70176), (3698, 69360), (4080, 62866), (4128, 62135), (4335, 59168), (4386, 58480), (4624, 55470), (5160, 49708), (5547, 46240), (5780, 44376), (5848, 43860), (6880, 37281), (6936, 36980), (7310, 35088), (7396, 34680), (8160, 31433), (8670, 29584), (8772, 29240), (9245, 27744), (9248, 27735), (10320, 24854), (10965, 23392), (11094, 23120), (11560, 22188), (11696, 21930), (12427, 20640), (13872, 18490), (14620, 17544), (14792, 17340)]