19865780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8209}}^1$

素因数の和:8240

約数の個数: 36

約数和(自身を含む): 45861060

約数和(自身を除く): 25995280

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8209, 16418, 32836, 41045, 82090, 90299, 164180, 180598, 361196, 451495, 902990, 993289, 1805980, 1986578, 3973156, 4966445, 9932890, 19865780]

約数ペア:

[(1, 19865780), (2, 9932890), (4, 4966445), (5, 3973156), (10, 1986578), (11, 1805980), (20, 993289), (22, 902990), (44, 451495), (55, 361196), (110, 180598), (121, 164180), (220, 90299), (242, 82090), (484, 41045), (605, 32836), (1210, 16418), (2420, 8209)]