21307912

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{569}}^1$

素因数の和:757

約数の個数: 32

約数和(自身を含む): 41587200

約数和(自身を除く): 20279288

約数列:

[1, 2, 4, 8, 31, 62, 124, 151, 248, 302, 569, 604, 1138, 1208, 2276, 4552, 4681, 9362, 17639, 18724, 35278, 37448, 70556, 85919, 141112, 171838, 343676, 687352, 2663489, 5326978, 10653956, 21307912]

約数ペア:

[(1, 21307912), (2, 10653956), (4, 5326978), (8, 2663489), (31, 687352), (62, 343676), (124, 171838), (151, 141112), (248, 85919), (302, 70556), (569, 37448), (604, 35278), (1138, 18724), (1208, 17639), (2276, 9362), (4552, 4681)]