21312400

素因数分解:

$2^4\times 5^2\times {\mathrm{53281}}^1$

素因数の和:53299

約数の個数: 30

約数和(自身を含む): 51204002

約数和(自身を除く): 29891602

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 53281, 106562, 213124, 266405, 426248, 532810, 852496, 1065620, 1332025, 2131240, 2664050, 4262480, 5328100, 10656200, 21312400]

約数ペア:

[(1, 21312400), (2, 10656200), (4, 5328100), (5, 4262480), (8, 2664050), (10, 2131240), (16, 1332025), (20, 1065620), (25, 852496), (40, 532810), (50, 426248), (80, 266405), (100, 213124), (200, 106562), (400, 53281)]