20801775

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:456

約数の個数: 48

約数和(自身を含む): 37140480

約数和(自身を除く): 16338705

約数列:

[1, 3, 5, 15, 23, 25, 31, 69, 75, 93, 115, 155, 345, 389, 465, 575, 713, 775, 1167, 1725, 1945, 2139, 2325, 3565, 5835, 8947, 9725, 10695, 12059, 17825, 26841, 29175, 36177, 44735, 53475, 60295, 134205, 180885, 223675, 277357, 301475, 671025, 832071, 904425, 1386785, 4160355, 6933925, 20801775]

約数ペア:

[(1, 20801775), (3, 6933925), (5, 4160355), (15, 1386785), (23, 904425), (25, 832071), (31, 671025), (69, 301475), (75, 277357), (93, 223675), (115, 180885), (155, 134205), (345, 60295), (389, 53475), (465, 44735), (575, 36177), (713, 29175), (775, 26841), (1167, 17825), (1725, 12059), (1945, 10695), (2139, 9725), (2325, 8947), (3565, 5835)]