21145456

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{16729}}^1$

素因数の和:16816

約数の個数: 20

約数和(自身を含む): 41490400

約数和(自身を除く): 20344944

約数列:

[1, 2, 4, 8, 16, 79, 158, 316, 632, 1264, 16729, 33458, 66916, 133832, 267664, 1321591, 2643182, 5286364, 10572728, 21145456]

約数ペア:

[(1, 21145456), (2, 10572728), (4, 5286364), (8, 2643182), (16, 1321591), (79, 267664), (158, 133832), (316, 66916), (632, 33458), (1264, 16729)]