20747205

素因数分解:

$3^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{491}}^1$

素因数の和:818

約数の個数: 32

約数和(自身を含む): 37077120

約数和(自身を除く): 16329915

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 313, 491, 939, 1473, 1565, 2455, 2817, 4419, 4695, 7365, 8451, 13257, 14085, 22095, 42255, 66285, 153683, 461049, 768415, 1383147, 2305245, 4149441, 6915735, 20747205]

約数ペア:

[(1, 20747205), (3, 6915735), (5, 4149441), (9, 2305245), (15, 1383147), (27, 768415), (45, 461049), (135, 153683), (313, 66285), (491, 42255), (939, 22095), (1473, 14085), (1565, 13257), (2455, 8451), (2817, 7365), (4419, 4695)]