20787080

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3967}}^1$

素因数の和:4109

約数の個数: 32

約数和(自身を含む): 47139840

約数和(自身を除く): 26352760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3967, 5240, 7934, 15868, 19835, 31736, 39670, 79340, 158680, 519677, 1039354, 2078708, 2598385, 4157416, 5196770, 10393540, 20787080]

約数ペア:

[(1, 20787080), (2, 10393540), (4, 5196770), (5, 4157416), (8, 2598385), (10, 2078708), (20, 1039354), (40, 519677), (131, 158680), (262, 79340), (524, 39670), (655, 31736), (1048, 19835), (1310, 15868), (2620, 7934), (3967, 5240)]