28209940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{11657}}^1$

素因数の和:11688

約数の個数: 36

約数和(自身を含む): 65121588

約数和(自身を除く): 36911648

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 11657, 23314, 46628, 58285, 116570, 128227, 233140, 256454, 512908, 641135, 1282270, 1410497, 2564540, 2820994, 5641988, 7052485, 14104970, 28209940]

約数ペア:

[(1, 28209940), (2, 14104970), (4, 7052485), (5, 5641988), (10, 2820994), (11, 2564540), (20, 1410497), (22, 1282270), (44, 641135), (55, 512908), (110, 256454), (121, 233140), (220, 128227), (242, 116570), (484, 58285), (605, 46628), (1210, 23314), (2420, 11657)]