20290280

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^2\times {\mathrm{113}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 46754820

約数和(自身を除く): 26464540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 113, 134, 226, 268, 335, 452, 536, 565, 670, 904, 1130, 1340, 2260, 2680, 4489, 4520, 7571, 8978, 15142, 17956, 22445, 30284, 35912, 37855, 44890, 60568, 75710, 89780, 151420, 179560, 302840, 507257, 1014514, 2029028, 2536285, 4058056, 5072570, 10145140, 20290280]

約数ペア:

[(1, 20290280), (2, 10145140), (4, 5072570), (5, 4058056), (8, 2536285), (10, 2029028), (20, 1014514), (40, 507257), (67, 302840), (113, 179560), (134, 151420), (226, 89780), (268, 75710), (335, 60568), (452, 44890), (536, 37855), (565, 35912), (670, 30284), (904, 22445), (1130, 17956), (1340, 15142), (2260, 8978), (2680, 7571), (4489, 4520)]