21639105

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{211}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 39289536

約数和(自身を除く): 17650431

約数列:

[1, 3, 5, 9, 15, 43, 45, 53, 129, 159, 211, 215, 265, 387, 477, 633, 645, 795, 1055, 1899, 1935, 2279, 2385, 3165, 6837, 9073, 9495, 11183, 11395, 20511, 27219, 33549, 34185, 45365, 55915, 81657, 100647, 102555, 136095, 167745, 408285, 480869, 503235, 1442607, 2404345, 4327821, 7213035, 21639105]

約数ペア:

[(1, 21639105), (3, 7213035), (5, 4327821), (9, 2404345), (15, 1442607), (43, 503235), (45, 480869), (53, 408285), (129, 167745), (159, 136095), (211, 102555), (215, 100647), (265, 81657), (387, 55915), (477, 45365), (633, 34185), (645, 33549), (795, 27219), (1055, 20511), (1899, 11395), (1935, 11183), (2279, 9495), (2385, 9073), (3165, 6837)]