21354355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{2473}}^1$

素因数の和:2646

約数の個数: 16

約数和(自身を含む): 28144224

約数和(自身を除く): 6789869

約数列:

[1, 5, 11, 55, 157, 785, 1727, 2473, 8635, 12365, 27203, 136015, 388261, 1941305, 4270871, 21354355]

約数ペア:

[(1, 21354355), (5, 4270871), (11, 1941305), (55, 388261), (157, 136015), (785, 27203), (1727, 12365), (2473, 8635)]