21400620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20981}}^1$

素因数の和:21010

約数の個数: 48

約数和(自身を含む): 63449568

約数和(自身を除く): 42048948

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 20981, 41962, 62943, 83924, 104905, 125886, 209810, 251772, 314715, 356677, 419620, 629430, 713354, 1070031, 1258860, 1426708, 1783385, 2140062, 3566770, 4280124, 5350155, 7133540, 10700310, 21400620]

約数ペア:

[(1, 21400620), (2, 10700310), (3, 7133540), (4, 5350155), (5, 4280124), (6, 3566770), (10, 2140062), (12, 1783385), (15, 1426708), (17, 1258860), (20, 1070031), (30, 713354), (34, 629430), (51, 419620), (60, 356677), (68, 314715), (85, 251772), (102, 209810), (170, 125886), (204, 104905), (255, 83924), (340, 62943), (510, 41962), (1020, 20981)]