20124890

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{64919}}^1$

素因数の和:64957

約数の個数: 16

約数和(自身を含む): 37393920

約数和(自身を除く): 17269030

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 64919, 129838, 324595, 649190, 2012489, 4024978, 10062445, 20124890]

約数ペア:

[(1, 20124890), (2, 10062445), (5, 4024978), (10, 2012489), (31, 649190), (62, 324595), (155, 129838), (310, 64919)]