21503870

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^2\times {\mathrm{1163}}^1$

素因数の和:1256

約数の個数: 24

約数和(自身を含む): 39662136

約数和(自身を除く): 18158266

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 1163, 1849, 2326, 3698, 5815, 9245, 11630, 18490, 50009, 100018, 250045, 500090, 2150387, 4300774, 10751935, 21503870]

約数ペア:

[(1, 21503870), (2, 10751935), (5, 4300774), (10, 2150387), (43, 500090), (86, 250045), (215, 100018), (430, 50009), (1163, 18490), (1849, 11630), (2326, 9245), (3698, 5815)]