20736872

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{317}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 45677520

約数和(自身を除く): 24940648

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 37, 52, 68, 74, 104, 136, 148, 221, 296, 317, 442, 481, 629, 634, 884, 962, 1258, 1268, 1768, 1924, 2516, 2536, 3848, 4121, 5032, 5389, 8177, 8242, 10778, 11729, 16354, 16484, 21556, 23458, 32708, 32968, 43112, 46916, 65416, 70057, 93832, 140114, 152477, 199393, 280228, 304954, 398786, 560456, 609908, 797572, 1219816, 1595144, 2592109, 5184218, 10368436, 20736872]

約数ペア:

[(1, 20736872), (2, 10368436), (4, 5184218), (8, 2592109), (13, 1595144), (17, 1219816), (26, 797572), (34, 609908), (37, 560456), (52, 398786), (68, 304954), (74, 280228), (104, 199393), (136, 152477), (148, 140114), (221, 93832), (296, 70057), (317, 65416), (442, 46916), (481, 43112), (629, 32968), (634, 32708), (884, 23458), (962, 21556), (1258, 16484), (1268, 16354), (1768, 11729), (1924, 10778), (2516, 8242), (2536, 8177), (3848, 5389), (4121, 5032)]