21051380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21481}}^1$

素因数の和:21504

約数の個数: 36

約数和(自身を含む): 51427908

約数和(自身を除く): 30376528

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21481, 42962, 85924, 107405, 150367, 214810, 300734, 429620, 601468, 751835, 1052569, 1503670, 2105138, 3007340, 4210276, 5262845, 10525690, 21051380]

約数ペア:

[(1, 21051380), (2, 10525690), (4, 5262845), (5, 4210276), (7, 3007340), (10, 2105138), (14, 1503670), (20, 1052569), (28, 751835), (35, 601468), (49, 429620), (70, 300734), (98, 214810), (140, 150367), (196, 107405), (245, 85924), (490, 42962), (980, 21481)]