661720

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 1516320

約数和(自身を除く): 854600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 233, 284, 355, 466, 568, 710, 932, 1165, 1420, 1864, 2330, 2840, 4660, 9320, 16543, 33086, 66172, 82715, 132344, 165430, 330860, 661720]

約数ペア:

[(1, 661720), (2, 330860), (4, 165430), (5, 132344), (8, 82715), (10, 66172), (20, 33086), (40, 16543), (71, 9320), (142, 4660), (233, 2840), (284, 2330), (355, 1864), (466, 1420), (568, 1165), (710, 932)]