21990038

素因数分解:

$2^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{3917}}^1$

素因数の和:4327

約数の個数: 16

約数和(自身を含む): 37800864

約数和(自身を除く): 15810826

約数列:

[1, 2, 7, 14, 401, 802, 2807, 3917, 5614, 7834, 27419, 54838, 1570717, 3141434, 10995019, 21990038]

約数ペア:

[(1, 21990038), (2, 10995019), (7, 3141434), (14, 1570717), (401, 54838), (802, 27419), (2807, 7834), (3917, 5614)]