20856975

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{113}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 36640512

約数和(自身を除く): 15783537

約数列:

[1, 3, 5, 15, 23, 25, 69, 75, 107, 113, 115, 321, 339, 345, 535, 565, 575, 1605, 1695, 1725, 2461, 2599, 2675, 2825, 7383, 7797, 8025, 8475, 12091, 12305, 12995, 36273, 36915, 38985, 60455, 61525, 64975, 181365, 184575, 194925, 278093, 302275, 834279, 906825, 1390465, 4171395, 6952325, 20856975]

約数ペア:

[(1, 20856975), (3, 6952325), (5, 4171395), (15, 1390465), (23, 906825), (25, 834279), (69, 302275), (75, 278093), (107, 194925), (113, 184575), (115, 181365), (321, 64975), (339, 61525), (345, 60455), (535, 38985), (565, 36915), (575, 36273), (1605, 12995), (1695, 12305), (1725, 12091), (2461, 8475), (2599, 8025), (2675, 7797), (2825, 7383)]