21310480

素因数分解:

$2^4\times 5^1\times {\mathrm{266381}}^1$

素因数の和:266394

約数の個数: 20

約数和(自身を含む): 49547052

約数和(自身を除く): 28236572

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266381, 532762, 1065524, 1331905, 2131048, 2663810, 4262096, 5327620, 10655240, 21310480]

約数ペア:

[(1, 21310480), (2, 10655240), (4, 5327620), (5, 4262096), (8, 2663810), (10, 2131048), (16, 1331905), (20, 1065524), (40, 532762), (80, 266381)]