65980840

素因数分解:

$2^3\times 5^1\times {\mathrm{1649521}}^1$

素因数の和:1649532

約数の個数: 16

約数和(自身を含む): 148456980

約数和(自身を除く): 82476140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1649521, 3299042, 6598084, 8247605, 13196168, 16495210, 32990420, 65980840]

約数ペア:

[(1, 65980840), (2, 32990420), (4, 16495210), (5, 13196168), (8, 8247605), (10, 6598084), (20, 3299042), (40, 1649521)]