21480720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:153

約数の個数: 160

約数和(自身を含む): 71245440

約数和(自身を除く): 49764720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 37, 40, 41, 48, 59, 60, 74, 80, 82, 111, 118, 120, 123, 148, 164, 177, 185, 205, 222, 236, 240, 246, 295, 296, 328, 354, 370, 410, 444, 472, 492, 555, 590, 592, 615, 656, 708, 740, 820, 885, 888, 944, 984, 1110, 1180, 1230, 1416, 1480, 1517, 1640, 1770, 1776, 1968, 2183, 2220, 2360, 2419, 2460, 2832, 2960, 3034, 3280, 3540, 4366, 4440, 4551, 4720, 4838, 4920, 6068, 6549, 7080, 7257, 7585, 8732, 8880, 9102, 9676, 9840, 10915, 12095, 12136, 13098, 14160, 14514, 15170, 17464, 18204, 19352, 21830, 22755, 24190, 24272, 26196, 29028, 30340, 32745, 34928, 36285, 36408, 38704, 43660, 45510, 48380, 52392, 58056, 60680, 65490, 72570, 72816, 87320, 89503, 91020, 96760, 104784, 116112, 121360, 130980, 145140, 174640, 179006, 182040, 193520, 261960, 268509, 290280, 358012, 364080, 447515, 523920, 537018, 580560, 716024, 895030, 1074036, 1342545, 1432048, 1790060, 2148072, 2685090, 3580120, 4296144, 5370180, 7160240, 10740360, 21480720]

約数ペア:

[(1, 21480720), (2, 10740360), (3, 7160240), (4, 5370180), (5, 4296144), (6, 3580120), (8, 2685090), (10, 2148072), (12, 1790060), (15, 1432048), (16, 1342545), (20, 1074036), (24, 895030), (30, 716024), (37, 580560), (40, 537018), (41, 523920), (48, 447515), (59, 364080), (60, 358012), (74, 290280), (80, 268509), (82, 261960), (111, 193520), (118, 182040), (120, 179006), (123, 174640), (148, 145140), (164, 130980), (177, 121360), (185, 116112), (205, 104784), (222, 96760), (236, 91020), (240, 89503), (246, 87320), (295, 72816), (296, 72570), (328, 65490), (354, 60680), (370, 58056), (410, 52392), (444, 48380), (472, 45510), (492, 43660), (555, 38704), (590, 36408), (592, 36285), (615, 34928), (656, 32745), (708, 30340), (740, 29028), (820, 26196), (885, 24272), (888, 24190), (944, 22755), (984, 21830), (1110, 19352), (1180, 18204), (1230, 17464), (1416, 15170), (1480, 14514), (1517, 14160), (1640, 13098), (1770, 12136), (1776, 12095), (1968, 10915), (2183, 9840), (2220, 9676), (2360, 9102), (2419, 8880), (2460, 8732), (2832, 7585), (2960, 7257), (3034, 7080), (3280, 6549), (3540, 6068), (4366, 4920), (4440, 4838), (4551, 4720)]