20400790

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65809}}^1$

素因数の和:65847

約数の個数: 16

約数和(自身を含む): 37906560

約数和(自身を除く): 17505770

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 65809, 131618, 329045, 658090, 2040079, 4080158, 10200395, 20400790]

約数ペア:

[(1, 20400790), (2, 10200395), (5, 4080158), (10, 2040079), (31, 658090), (62, 329045), (155, 131618), (310, 65809)]