79904980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{128879}}^1$

素因数の和:128919

約数の個数: 24

約数和(自身を含む): 173214720

約数和(自身を除く): 93309740

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 128879, 257758, 515516, 644395, 1288790, 2577580, 3995249, 7990498, 15980996, 19976245, 39952490, 79904980]

約数ペア:

[(1, 79904980), (2, 39952490), (4, 19976245), (5, 15980996), (10, 7990498), (20, 3995249), (31, 2577580), (62, 1288790), (124, 644395), (155, 515516), (310, 257758), (620, 128879)]