20388508

素因数分解:

$2^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{211}}^1$

素因数の和:275

約数の個数: 72

約数和(自身を含む): 45677520

約数和(自身を除く): 25289012

約数列:

[1, 2, 4, 7, 14, 17, 28, 29, 34, 49, 58, 68, 98, 116, 119, 196, 203, 211, 238, 406, 422, 476, 493, 812, 833, 844, 986, 1421, 1477, 1666, 1972, 2842, 2954, 3332, 3451, 3587, 5684, 5908, 6119, 6902, 7174, 10339, 12238, 13804, 14348, 20678, 24157, 24476, 25109, 41356, 42833, 48314, 50218, 85666, 96628, 100436, 104023, 171332, 175763, 208046, 299831, 351526, 416092, 599662, 703052, 728161, 1199324, 1456322, 2912644, 5097127, 10194254, 20388508]

約数ペア:

[(1, 20388508), (2, 10194254), (4, 5097127), (7, 2912644), (14, 1456322), (17, 1199324), (28, 728161), (29, 703052), (34, 599662), (49, 416092), (58, 351526), (68, 299831), (98, 208046), (116, 175763), (119, 171332), (196, 104023), (203, 100436), (211, 96628), (238, 85666), (406, 50218), (422, 48314), (476, 42833), (493, 41356), (812, 25109), (833, 24476), (844, 24157), (986, 20678), (1421, 14348), (1477, 13804), (1666, 12238), (1972, 10339), (2842, 7174), (2954, 6902), (3332, 6119), (3451, 5908), (3587, 5684)]