21396904

素因数分解:

$2^3\times {\mathrm{421}}^1\times {\mathrm{6353}}^1$

素因数の和:6780

約数の個数: 16

約数和(自身を含む): 40220820

約数和(自身を除く): 18823916

約数列:

[1, 2, 4, 8, 421, 842, 1684, 3368, 6353, 12706, 25412, 50824, 2674613, 5349226, 10698452, 21396904]

約数ペア:

[(1, 21396904), (2, 10698452), (4, 5349226), (8, 2674613), (421, 50824), (842, 25412), (1684, 12706), (3368, 6353)]