20308925

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 31664640

約数和(自身を除く): 11355715

約数列:

[1, 5, 7, 13, 25, 35, 65, 79, 91, 113, 175, 325, 395, 455, 553, 565, 791, 1027, 1469, 1975, 2275, 2765, 2825, 3955, 5135, 7189, 7345, 8927, 10283, 13825, 19775, 25675, 35945, 36725, 44635, 51415, 62489, 116051, 179725, 223175, 257075, 312445, 580255, 812357, 1562225, 2901275, 4061785, 20308925]

約数ペア:

[(1, 20308925), (5, 4061785), (7, 2901275), (13, 1562225), (25, 812357), (35, 580255), (65, 312445), (79, 257075), (91, 223175), (113, 179725), (175, 116051), (325, 62489), (395, 51415), (455, 44635), (553, 36725), (565, 35945), (791, 25675), (1027, 19775), (1469, 13825), (1975, 10283), (2275, 8927), (2765, 7345), (2825, 7189), (3955, 5135)]