989080

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 2260800

約数和(自身を除く): 1271720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 313, 316, 395, 626, 632, 790, 1252, 1565, 1580, 2504, 3130, 3160, 6260, 12520, 24727, 49454, 98908, 123635, 197816, 247270, 494540, 989080]

約数ペア:

[(1, 989080), (2, 494540), (4, 247270), (5, 197816), (8, 123635), (10, 98908), (20, 49454), (40, 24727), (79, 12520), (158, 6260), (313, 3160), (316, 3130), (395, 2504), (626, 1580), (632, 1565), (790, 1252)]