21590816

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:154

約数の個数: 96

約数和(自身を含む): 50295168

約数和(自身を除く): 28704352

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 32, 34, 43, 52, 68, 71, 86, 104, 136, 142, 172, 208, 221, 272, 284, 344, 416, 442, 544, 559, 568, 688, 731, 884, 923, 1118, 1136, 1207, 1376, 1462, 1768, 1846, 2236, 2272, 2414, 2924, 3053, 3536, 3692, 4472, 4828, 5848, 6106, 7072, 7384, 8944, 9503, 9656, 11696, 12212, 14768, 15691, 17888, 19006, 19312, 23392, 24424, 29536, 31382, 38012, 38624, 39689, 48848, 51901, 62764, 76024, 79378, 97696, 103802, 125528, 152048, 158756, 207604, 251056, 304096, 317512, 415208, 502112, 635024, 674713, 830416, 1270048, 1349426, 1660832, 2698852, 5397704, 10795408, 21590816]

約数ペア:

[(1, 21590816), (2, 10795408), (4, 5397704), (8, 2698852), (13, 1660832), (16, 1349426), (17, 1270048), (26, 830416), (32, 674713), (34, 635024), (43, 502112), (52, 415208), (68, 317512), (71, 304096), (86, 251056), (104, 207604), (136, 158756), (142, 152048), (172, 125528), (208, 103802), (221, 97696), (272, 79378), (284, 76024), (344, 62764), (416, 51901), (442, 48848), (544, 39689), (559, 38624), (568, 38012), (688, 31382), (731, 29536), (884, 24424), (923, 23392), (1118, 19312), (1136, 19006), (1207, 17888), (1376, 15691), (1462, 14768), (1768, 12212), (1846, 11696), (2236, 9656), (2272, 9503), (2414, 8944), (2924, 7384), (3053, 7072), (3536, 6106), (3692, 5848), (4472, 4828)]