128640440

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{40709}}^1$

素因数の和:40799

約数の個数: 32

約数和(自身を含む): 293112000

約数和(自身を除く): 164471560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 40709, 81418, 162836, 203545, 325672, 407090, 814180, 1628360, 3216011, 6432022, 12864044, 16080055, 25728088, 32160110, 64320220, 128640440]

約数ペア:

[(1, 128640440), (2, 64320220), (4, 32160110), (5, 25728088), (8, 16080055), (10, 12864044), (20, 6432022), (40, 3216011), (79, 1628360), (158, 814180), (316, 407090), (395, 325672), (632, 203545), (790, 162836), (1580, 81418), (3160, 40709)]