20949940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^3\times {\mathrm{787}}^1$

素因数の和:829

約数の個数: 48

約数和(自身を含む): 48452544

約数和(自身を除く): 27502604

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 787, 1210, 1331, 1574, 2420, 2662, 3148, 3935, 5324, 6655, 7870, 8657, 13310, 15740, 17314, 26620, 34628, 43285, 86570, 95227, 173140, 190454, 380908, 476135, 952270, 1047497, 1904540, 2094994, 4189988, 5237485, 10474970, 20949940]

約数ペア:

[(1, 20949940), (2, 10474970), (4, 5237485), (5, 4189988), (10, 2094994), (11, 1904540), (20, 1047497), (22, 952270), (44, 476135), (55, 380908), (110, 190454), (121, 173140), (220, 95227), (242, 86570), (484, 43285), (605, 34628), (787, 26620), (1210, 17314), (1331, 15740), (1574, 13310), (2420, 8657), (2662, 7870), (3148, 6655), (3935, 5324)]