643940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{2927}}^1$

素因数の和:2947

約数の個数: 24

約数和(自身を含む): 1475712

約数和(自身を除く): 831772

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 2927, 5854, 11708, 14635, 29270, 32197, 58540, 64394, 128788, 160985, 321970, 643940]

約数ペア:

[(1, 643940), (2, 321970), (4, 160985), (5, 128788), (10, 64394), (11, 58540), (20, 32197), (22, 29270), (44, 14635), (55, 11708), (110, 5854), (220, 2927)]