21017872

素因数分解:

$2^4\times {\mathrm{163}}^1\times {\mathrm{8059}}^1$

素因数の和:8230

約数の個数: 20

約数和(自身を含む): 40977040

約数和(自身を除く): 19959168

約数列:

[1, 2, 4, 8, 16, 163, 326, 652, 1304, 2608, 8059, 16118, 32236, 64472, 128944, 1313617, 2627234, 5254468, 10508936, 21017872]

約数ペア:

[(1, 21017872), (2, 10508936), (4, 5254468), (8, 2627234), (16, 1313617), (163, 128944), (326, 64472), (652, 32236), (1304, 16118), (2608, 8059)]