28670680

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 67161600

約数和(自身を除く): 38490920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 79, 86, 158, 172, 211, 215, 316, 344, 395, 422, 430, 632, 790, 844, 860, 1055, 1580, 1688, 1720, 2110, 3160, 3397, 4220, 6794, 8440, 9073, 13588, 16669, 16985, 18146, 27176, 33338, 33970, 36292, 45365, 66676, 67940, 72584, 83345, 90730, 133352, 135880, 166690, 181460, 333380, 362920, 666760, 716767, 1433534, 2867068, 3583835, 5734136, 7167670, 14335340, 28670680]

約数ペア:

[(1, 28670680), (2, 14335340), (4, 7167670), (5, 5734136), (8, 3583835), (10, 2867068), (20, 1433534), (40, 716767), (43, 666760), (79, 362920), (86, 333380), (158, 181460), (172, 166690), (211, 135880), (215, 133352), (316, 90730), (344, 83345), (395, 72584), (422, 67940), (430, 66676), (632, 45365), (790, 36292), (844, 33970), (860, 33338), (1055, 27176), (1580, 18146), (1688, 16985), (1720, 16669), (2110, 13588), (3160, 9073), (3397, 8440), (4220, 6794)]