21981365

素因数分解:

$5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{3853}}^1$

素因数の和:4028

約数の個数: 16

約数和(自身を含む): 30338688

約数和(自身を除く): 8357323

約数列:

[1, 5, 7, 35, 163, 815, 1141, 3853, 5705, 19265, 26971, 134855, 628039, 3140195, 4396273, 21981365]

約数ペア:

[(1, 21981365), (5, 4396273), (7, 3140195), (35, 628039), (163, 134855), (815, 26971), (1141, 19265), (3853, 5705)]