21031970

素因数分解:

$2^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{31391}}^1$

素因数の和:31465

約数の個数: 16

約数和(自身を含む): 38423808

約数和(自身を除く): 17391838

約数列:

[1, 2, 5, 10, 67, 134, 335, 670, 31391, 62782, 156955, 313910, 2103197, 4206394, 10515985, 21031970]

約数ペア:

[(1, 21031970), (2, 10515985), (5, 4206394), (10, 2103197), (67, 313910), (134, 156955), (335, 62782), (670, 31391)]