621940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{257}}^1$

素因数の和:288

約数の個数: 36

約数和(自身を含む): 1441188

約数和(自身を除く): 819248

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 257, 484, 514, 605, 1028, 1210, 1285, 2420, 2570, 2827, 5140, 5654, 11308, 14135, 28270, 31097, 56540, 62194, 124388, 155485, 310970, 621940]

約数ペア:

[(1, 621940), (2, 310970), (4, 155485), (5, 124388), (10, 62194), (11, 56540), (20, 31097), (22, 28270), (44, 14135), (55, 11308), (110, 5654), (121, 5140), (220, 2827), (242, 2570), (257, 2420), (484, 1285), (514, 1210), (605, 1028)]