21081604

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{74231}}^1$

素因数の和:74306

約数の個数: 12

約数和(自身を含む): 37412928

約数和(自身を除く): 16331324

約数列:

[1, 2, 4, 71, 142, 284, 74231, 148462, 296924, 5270401, 10540802, 21081604]

約数ペア:

[(1, 21081604), (2, 10540802), (4, 5270401), (71, 296924), (142, 148462), (284, 74231)]