20399775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 37378560

約数和(自身を除く): 16978785

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 79, 165, 237, 275, 313, 395, 825, 869, 939, 1185, 1565, 1975, 2607, 3443, 4345, 4695, 5925, 7825, 10329, 13035, 17215, 21725, 23475, 24727, 51645, 65175, 74181, 86075, 123635, 258225, 271997, 370905, 618175, 815991, 1359985, 1854525, 4079955, 6799925, 20399775]

約数ペア:

[(1, 20399775), (3, 6799925), (5, 4079955), (11, 1854525), (15, 1359985), (25, 815991), (33, 618175), (55, 370905), (75, 271997), (79, 258225), (165, 123635), (237, 86075), (275, 74181), (313, 65175), (395, 51645), (825, 24727), (869, 23475), (939, 21725), (1185, 17215), (1565, 13035), (1975, 10329), (2607, 7825), (3443, 5925), (4345, 4695)]