21972680

素因数分解:

$2^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{2027}}^1$

素因数の和:2309

約数の個数: 32

約数和(自身を含む): 49645440

約数和(自身を除く): 27672760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 271, 542, 1084, 1355, 2027, 2168, 2710, 4054, 5420, 8108, 10135, 10840, 16216, 20270, 40540, 81080, 549317, 1098634, 2197268, 2746585, 4394536, 5493170, 10986340, 21972680]

約数ペア:

[(1, 21972680), (2, 10986340), (4, 5493170), (5, 4394536), (8, 2746585), (10, 2197268), (20, 1098634), (40, 549317), (271, 81080), (542, 40540), (1084, 20270), (1355, 16216), (2027, 10840), (2168, 10135), (2710, 8108), (4054, 5420)]