21823420

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1697}}^1$

素因数の和:2349

約数の個数: 24

約数和(自身を含む): 45927504

約数和(自身を除く): 24104084

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1697, 2572, 3215, 3394, 6430, 6788, 8485, 12860, 16970, 33940, 1091171, 2182342, 4364684, 5455855, 10911710, 21823420]

約数ペア:

[(1, 21823420), (2, 10911710), (4, 5455855), (5, 4364684), (10, 2182342), (20, 1091171), (643, 33940), (1286, 16970), (1697, 12860), (2572, 8485), (3215, 6788), (3394, 6430)]