21838480

素因数分解:

$2^4\times 5^1\times {\mathrm{272981}}^1$

素因数の和:272994

約数の個数: 20

約数和(自身を含む): 50774652

約数和(自身を除く): 28936172

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272981, 545962, 1091924, 1364905, 2183848, 2729810, 4367696, 5459620, 10919240, 21838480]

約数ペア:

[(1, 21838480), (2, 10919240), (4, 5459620), (5, 4367696), (8, 2729810), (10, 2183848), (16, 1364905), (20, 1091924), (40, 545962), (80, 272981)]