21521045

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{233}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 33611760

約数和(自身を除く): 12090715

約数列:

[1, 5, 7, 13, 29, 35, 49, 65, 91, 145, 203, 233, 245, 377, 455, 637, 1015, 1165, 1421, 1631, 1885, 2639, 3029, 3185, 6757, 7105, 8155, 11417, 13195, 15145, 18473, 21203, 33785, 47299, 57085, 87841, 92365, 106015, 148421, 236495, 331093, 439205, 614887, 742105, 1655465, 3074435, 4304209, 21521045]

約数ペア:

[(1, 21521045), (5, 4304209), (7, 3074435), (13, 1655465), (29, 742105), (35, 614887), (49, 439205), (65, 331093), (91, 236495), (145, 148421), (203, 106015), (233, 92365), (245, 87841), (377, 57085), (455, 47299), (637, 33785), (1015, 21203), (1165, 18473), (1421, 15145), (1631, 13195), (1885, 11417), (2639, 8155), (3029, 7105), (3185, 6757)]