21073540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61981}}^1$

素因数の和:62007

約数の個数: 24

約数和(自身を含む): 46858392

約数和(自身を除く): 25784852

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61981, 123962, 247924, 309905, 619810, 1053677, 1239620, 2107354, 4214708, 5268385, 10536770, 21073540]

約数ペア:

[(1, 21073540), (2, 10536770), (4, 5268385), (5, 4214708), (10, 2107354), (17, 1239620), (20, 1053677), (34, 619810), (68, 309905), (85, 247924), (170, 123962), (340, 61981)]