78878540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{303379}}^1$

素因数の和:303401

約数の個数: 24

約数和(自身を含む): 178387440

約数和(自身を除く): 99508900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 303379, 606758, 1213516, 1516895, 3033790, 3943927, 6067580, 7887854, 15775708, 19719635, 39439270, 78878540]

約数ペア:

[(1, 78878540), (2, 39439270), (4, 19719635), (5, 15775708), (10, 7887854), (13, 6067580), (20, 3943927), (26, 3033790), (52, 1516895), (65, 1213516), (130, 606758), (260, 303379)]