20993950

素因数分解:

$2^1\times 5^2\times {\mathrm{643}}^1\times {\mathrm{653}}^1$

素因数の和:1308

約数の個数: 24

約数和(自身を含む): 39169368

約数和(自身を除く): 18175418

約数列:

[1, 2, 5, 10, 25, 50, 643, 653, 1286, 1306, 3215, 3265, 6430, 6530, 16075, 16325, 32150, 32650, 419879, 839758, 2099395, 4198790, 10496975, 20993950]

約数ペア:

[(1, 20993950), (2, 10496975), (5, 4198790), (10, 2099395), (25, 839758), (50, 419879), (643, 32650), (653, 32150), (1286, 16325), (1306, 16075), (3215, 6530), (3265, 6430)]