21053960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16979}}^1$

素因数の和:17021

約数の個数: 32

約数和(自身を含む): 48902400

約数和(自身を除く): 27848440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16979, 33958, 67916, 84895, 135832, 169790, 339580, 526349, 679160, 1052698, 2105396, 2631745, 4210792, 5263490, 10526980, 21053960]

約数ペア:

[(1, 21053960), (2, 10526980), (4, 5263490), (5, 4210792), (8, 2631745), (10, 2105396), (20, 1052698), (31, 679160), (40, 526349), (62, 339580), (124, 169790), (155, 135832), (248, 84895), (310, 67916), (620, 33958), (1240, 16979)]