21731312

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{211}}^1$

素因数の和:417

約数の個数: 40

約数和(自身を含む): 43611792

約数和(自身を除く): 21880480

約数列:

[1, 2, 4, 8, 16, 41, 82, 157, 164, 211, 314, 328, 422, 628, 656, 844, 1256, 1688, 2512, 3376, 6437, 8651, 12874, 17302, 25748, 33127, 34604, 51496, 66254, 69208, 102992, 132508, 138416, 265016, 530032, 1358207, 2716414, 5432828, 10865656, 21731312]

約数ペア:

[(1, 21731312), (2, 10865656), (4, 5432828), (8, 2716414), (16, 1358207), (41, 530032), (82, 265016), (157, 138416), (164, 132508), (211, 102992), (314, 69208), (328, 66254), (422, 51496), (628, 34604), (656, 33127), (844, 25748), (1256, 17302), (1688, 12874), (2512, 8651), (3376, 6437)]