21007856

素因数分解:

$2^4\times {\mathrm{157}}^1\times {\mathrm{8363}}^1$

素因数の和:8528

約数の個数: 20

約数和(自身を含む): 40966872

約数和(自身を除く): 19959016

約数列:

[1, 2, 4, 8, 16, 157, 314, 628, 1256, 2512, 8363, 16726, 33452, 66904, 133808, 1312991, 2625982, 5251964, 10503928, 21007856]

約数ペア:

[(1, 21007856), (2, 10503928), (4, 5251964), (8, 2625982), (16, 1312991), (157, 133808), (314, 66904), (628, 33452), (1256, 16726), (2512, 8363)]