21871520

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1$

素因数の和:103

約数の個数: 144

約数和(自身を含む): 61272288

約数和(自身を除く): 39400768

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 32, 34, 40, 43, 44, 55, 68, 80, 85, 86, 88, 110, 136, 160, 170, 172, 176, 187, 215, 220, 272, 289, 340, 344, 352, 374, 430, 440, 473, 544, 578, 680, 688, 731, 748, 860, 880, 935, 946, 1156, 1360, 1376, 1445, 1462, 1496, 1720, 1760, 1870, 1892, 2312, 2365, 2720, 2890, 2924, 2992, 3179, 3440, 3655, 3740, 3784, 4624, 4730, 5780, 5848, 5984, 6358, 6880, 7310, 7480, 7568, 8041, 9248, 9460, 11560, 11696, 12427, 12716, 14620, 14960, 15136, 15895, 16082, 18920, 23120, 23392, 24854, 25432, 29240, 29920, 31790, 32164, 37840, 40205, 46240, 49708, 50864, 58480, 62135, 63580, 64328, 75680, 80410, 99416, 101728, 116960, 124270, 127160, 128656, 136697, 160820, 198832, 248540, 254320, 257312, 273394, 321640, 397664, 497080, 508640, 546788, 643280, 683485, 994160, 1093576, 1286560, 1366970, 1988320, 2187152, 2733940, 4374304, 5467880, 10935760, 21871520]

約数ペア:

[(1, 21871520), (2, 10935760), (4, 5467880), (5, 4374304), (8, 2733940), (10, 2187152), (11, 1988320), (16, 1366970), (17, 1286560), (20, 1093576), (22, 994160), (32, 683485), (34, 643280), (40, 546788), (43, 508640), (44, 497080), (55, 397664), (68, 321640), (80, 273394), (85, 257312), (86, 254320), (88, 248540), (110, 198832), (136, 160820), (160, 136697), (170, 128656), (172, 127160), (176, 124270), (187, 116960), (215, 101728), (220, 99416), (272, 80410), (289, 75680), (340, 64328), (344, 63580), (352, 62135), (374, 58480), (430, 50864), (440, 49708), (473, 46240), (544, 40205), (578, 37840), (680, 32164), (688, 31790), (731, 29920), (748, 29240), (860, 25432), (880, 24854), (935, 23392), (946, 23120), (1156, 18920), (1360, 16082), (1376, 15895), (1445, 15136), (1462, 14960), (1496, 14620), (1720, 12716), (1760, 12427), (1870, 11696), (1892, 11560), (2312, 9460), (2365, 9248), (2720, 8041), (2890, 7568), (2924, 7480), (2992, 7310), (3179, 6880), (3440, 6358), (3655, 5984), (3740, 5848), (3784, 5780), (4624, 4730)]