21351710

素因数分解:

$2^1\times 5^1\times {\mathrm{641}}^1\times {\mathrm{3331}}^1$

素因数の和:3979

約数の個数: 16

約数和(自身を含む): 38504592

約数和(自身を除く): 17152882

約数列:

[1, 2, 5, 10, 641, 1282, 3205, 3331, 6410, 6662, 16655, 33310, 2135171, 4270342, 10675855, 21351710]

約数ペア:

[(1, 21351710), (2, 10675855), (5, 4270342), (10, 2135171), (641, 33310), (1282, 16655), (3205, 6662), (3331, 6410)]