21804580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155747}}^1$

素因数の和:155763

約数の個数: 24

約数和(自身を含む): 52331328

約数和(自身を除く): 30526748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155747, 311494, 622988, 778735, 1090229, 1557470, 2180458, 3114940, 4360916, 5451145, 10902290, 21804580]

約数ペア:

[(1, 21804580), (2, 10902290), (4, 5451145), (5, 4360916), (7, 3114940), (10, 2180458), (14, 1557470), (20, 1090229), (28, 778735), (35, 622988), (70, 311494), (140, 155747)]