20686840

素因数分解:

$2^3\times 5^1\times {\mathrm{463}}^1\times {\mathrm{1117}}^1$

素因数の和:1591

約数の個数: 32

約数和(自身を含む): 46687680

約数和(自身を除く): 26000840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 463, 926, 1117, 1852, 2234, 2315, 3704, 4468, 4630, 5585, 8936, 9260, 11170, 18520, 22340, 44680, 517171, 1034342, 2068684, 2585855, 4137368, 5171710, 10343420, 20686840]

約数ペア:

[(1, 20686840), (2, 10343420), (4, 5171710), (5, 4137368), (8, 2585855), (10, 2068684), (20, 1034342), (40, 517171), (463, 44680), (926, 22340), (1117, 18520), (1852, 11170), (2234, 9260), (2315, 8936), (3704, 5585), (4468, 4630)]