20812305

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{557}}^1$

素因数の和:665

約数の個数: 32

約数和(自身を含む): 34712064

約数和(自身を除く): 13899759

約数列:

[1, 3, 5, 15, 47, 53, 141, 159, 235, 265, 557, 705, 795, 1671, 2491, 2785, 7473, 8355, 12455, 26179, 29521, 37365, 78537, 88563, 130895, 147605, 392685, 442815, 1387487, 4162461, 6937435, 20812305]

約数ペア:

[(1, 20812305), (3, 6937435), (5, 4162461), (15, 1387487), (47, 442815), (53, 392685), (141, 147605), (159, 130895), (235, 88563), (265, 78537), (557, 37365), (705, 29521), (795, 26179), (1671, 12455), (2491, 8355), (2785, 7473)]