21098920

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{2207}}^1$

素因数の和:2457

約数の個数: 32

約数和(自身を含む): 47692800

約数和(自身を除く): 26593880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2207, 2390, 4414, 4780, 8828, 9560, 11035, 17656, 22070, 44140, 88280, 527473, 1054946, 2109892, 2637365, 4219784, 5274730, 10549460, 21098920]

約数ペア:

[(1, 21098920), (2, 10549460), (4, 5274730), (5, 4219784), (8, 2637365), (10, 2109892), (20, 1054946), (40, 527473), (239, 88280), (478, 44140), (956, 22070), (1195, 17656), (1912, 11035), (2207, 9560), (2390, 8828), (4414, 4780)]