20767915

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 31190400

約数和(自身を除く): 10422485

約数列:

[1, 5, 7, 29, 35, 37, 49, 79, 145, 185, 203, 245, 259, 395, 553, 1015, 1073, 1295, 1421, 1813, 2291, 2765, 2923, 3871, 5365, 7105, 7511, 9065, 11455, 14615, 16037, 19355, 20461, 37555, 52577, 80185, 84767, 102305, 112259, 143227, 262885, 423835, 561295, 593369, 716135, 2966845, 4153583, 20767915]

約数ペア:

[(1, 20767915), (5, 4153583), (7, 2966845), (29, 716135), (35, 593369), (37, 561295), (49, 423835), (79, 262885), (145, 143227), (185, 112259), (203, 102305), (245, 84767), (259, 80185), (395, 52577), (553, 37555), (1015, 20461), (1073, 19355), (1295, 16037), (1421, 14615), (1813, 11455), (2291, 9065), (2765, 7511), (2923, 7105), (3871, 5365)]