21780572

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{6781}}^1$

素因数の和:6869

約数の個数: 24

約数和(自身を含む): 42156912

約数和(自身を除く): 20376340

約数列:

[1, 2, 4, 11, 22, 44, 73, 146, 292, 803, 1606, 3212, 6781, 13562, 27124, 74591, 149182, 298364, 495013, 990026, 1980052, 5445143, 10890286, 21780572]

約数ペア:

[(1, 21780572), (2, 10890286), (4, 5445143), (11, 1980052), (22, 990026), (44, 495013), (73, 298364), (146, 149182), (292, 74591), (803, 27124), (1606, 13562), (3212, 6781)]