21290090

素因数分解:

$2^1\times 5^1\times {\mathrm{283}}^1\times {\mathrm{7523}}^1$

素因数の和:7813

約数の個数: 16

約数和(自身を含む): 38462688

約数和(自身を除く): 17172598

約数列:

[1, 2, 5, 10, 283, 566, 1415, 2830, 7523, 15046, 37615, 75230, 2129009, 4258018, 10645045, 21290090]

約数ペア:

[(1, 21290090), (2, 10645045), (5, 4258018), (10, 2129009), (283, 75230), (566, 37615), (1415, 15046), (2830, 7523)]