20340080

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3581}}^1$

素因数の和:3665

約数の個数: 40

約数和(自身を含む): 47970144

約数和(自身を除く): 27630064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3581, 5680, 7162, 14324, 17905, 28648, 35810, 57296, 71620, 143240, 254251, 286480, 508502, 1017004, 1271255, 2034008, 2542510, 4068016, 5085020, 10170040, 20340080]

約数ペア:

[(1, 20340080), (2, 10170040), (4, 5085020), (5, 4068016), (8, 2542510), (10, 2034008), (16, 1271255), (20, 1017004), (40, 508502), (71, 286480), (80, 254251), (142, 143240), (284, 71620), (355, 57296), (568, 35810), (710, 28648), (1136, 17905), (1420, 14324), (2840, 7162), (3581, 5680)]