81299620

素因数分解:

$2^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{23497}}^1$

素因数の和:23679

約数の個数: 24

約数和(自身を含む): 171723384

約数和(自身を除く): 90423764

約数列:

[1, 2, 4, 5, 10, 20, 173, 346, 692, 865, 1730, 3460, 23497, 46994, 93988, 117485, 234970, 469940, 4064981, 8129962, 16259924, 20324905, 40649810, 81299620]

約数ペア:

[(1, 81299620), (2, 40649810), (4, 20324905), (5, 16259924), (10, 8129962), (20, 4064981), (173, 469940), (346, 234970), (692, 117485), (865, 93988), (1730, 46994), (3460, 23497)]