31688120

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{2531}}^1$

素因数の和:2855

約数の個数: 32

約数和(自身を含む): 71554320

約数和(自身を除く): 39866200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 2504, 2531, 3130, 5062, 6260, 10124, 12520, 12655, 20248, 25310, 50620, 101240, 792203, 1584406, 3168812, 3961015, 6337624, 7922030, 15844060, 31688120]

約数ペア:

[(1, 31688120), (2, 15844060), (4, 7922030), (5, 6337624), (8, 3961015), (10, 3168812), (20, 1584406), (40, 792203), (313, 101240), (626, 50620), (1252, 25310), (1565, 20248), (2504, 12655), (2531, 12520), (3130, 10124), (5062, 6260)]