21427480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31511}}^1$

素因数の和:31539

約数の個数: 32

約数和(自身を含む): 51049440

約数和(自身を除く): 29621960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31511, 63022, 126044, 157555, 252088, 315110, 535687, 630220, 1071374, 1260440, 2142748, 2678435, 4285496, 5356870, 10713740, 21427480]

約数ペア:

[(1, 21427480), (2, 10713740), (4, 5356870), (5, 4285496), (8, 2678435), (10, 2142748), (17, 1260440), (20, 1071374), (34, 630220), (40, 535687), (68, 315110), (85, 252088), (136, 157555), (170, 126044), (340, 63022), (680, 31511)]