1279200040

素因数分解:

$2^3\times 5^1\times {\mathrm{31980001}}^1$

素因数の和:31980012

約数の個数: 16

約数和(自身を含む): 2878200180

約数和(自身を除く): 1599000140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 31980001, 63960002, 127920004, 159900005, 255840008, 319800010, 639600020, 1279200040]

約数ペア:

[(1, 1279200040), (2, 639600020), (4, 319800010), (5, 255840008), (8, 159900005), (10, 127920004), (20, 63960002), (40, 31980001)]