21453680

素因数分解:

$2^4\times 5^1\times {\mathrm{268171}}^1$

素因数の和:268184

約数の個数: 20

約数和(自身を含む): 49879992

約数和(自身を除く): 28426312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268171, 536342, 1072684, 1340855, 2145368, 2681710, 4290736, 5363420, 10726840, 21453680]

約数ペア:

[(1, 21453680), (2, 10726840), (4, 5363420), (5, 4290736), (8, 2681710), (10, 2145368), (16, 1340855), (20, 1072684), (40, 536342), (80, 268171)]