21690470

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127591}}^1$

素因数の和:127615

約数の個数: 16

約数和(自身を含む): 41339808

約数和(自身を除く): 19649338

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 127591, 255182, 637955, 1275910, 2169047, 4338094, 10845235, 21690470]

約数ペア:

[(1, 21690470), (2, 10845235), (5, 4338094), (10, 2169047), (17, 1275910), (34, 637955), (85, 255182), (170, 127591)]