20997400557

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{820243}}^1$

素因数の和:820329

約数の個数: 32

約数和(自身を含む): 34017159168

約数和(自身を除く): 13019758611

約数列:

[1, 3, 7, 21, 23, 53, 69, 159, 161, 371, 483, 1113, 1219, 3657, 8533, 25599, 820243, 2460729, 5741701, 17225103, 18865589, 43472879, 56596767, 130418637, 132059123, 304310153, 396177369, 912930459, 999876217, 2999628651, 6999133519, 20997400557]

約数ペア:

[(1, 20997400557), (3, 6999133519), (7, 2999628651), (21, 999876217), (23, 912930459), (53, 396177369), (69, 304310153), (159, 132059123), (161, 130418637), (371, 56596767), (483, 43472879), (1113, 18865589), (1219, 17225103), (3657, 5741701), (8533, 2460729), (25599, 820243)]