19721642

素因数分解:

$2^1\times {\mathrm{31}}^3\times {\mathrm{331}}^1$

素因数の和:426

約数の個数: 16

約数和(自身を含む): 30660864

約数和(自身を除く): 10939222

約数列:

[1, 2, 31, 62, 331, 662, 961, 1922, 10261, 20522, 29791, 59582, 318091, 636182, 9860821, 19721642]

約数ペア:

[(1, 19721642), (2, 9860821), (31, 636182), (62, 318091), (331, 59582), (662, 29791), (961, 20522), (1922, 10261)]