20990228

素因数分解:

$2^2\times 7^3\times {\mathrm{15299}}^1$

素因数の和:15324

約数の個数: 24

約数和(自身を含む): 42840000

約数和(自身を除く): 21849772

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 343, 686, 1372, 15299, 30598, 61196, 107093, 214186, 428372, 749651, 1499302, 2998604, 5247557, 10495114, 20990228]

約数ペア:

[(1, 20990228), (2, 10495114), (4, 5247557), (7, 2998604), (14, 1499302), (28, 749651), (49, 428372), (98, 214186), (196, 107093), (343, 61196), (686, 30598), (1372, 15299)]