8990320

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1031}}^1$

素因数の和:1153

約数の個数: 40

約数和(自身を含む): 21114720

約数和(自身を除く): 12124400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1031, 1090, 1744, 2062, 2180, 4124, 4360, 5155, 8248, 8720, 10310, 16496, 20620, 41240, 82480, 112379, 224758, 449516, 561895, 899032, 1123790, 1798064, 2247580, 4495160, 8990320]

約数ペア:

[(1, 8990320), (2, 4495160), (4, 2247580), (5, 1798064), (8, 1123790), (10, 899032), (16, 561895), (20, 449516), (40, 224758), (80, 112379), (109, 82480), (218, 41240), (436, 20620), (545, 16496), (872, 10310), (1031, 8720), (1090, 8248), (1744, 5155), (2062, 4360), (2180, 4124)]