21815020

素因数分解:

$2^2\times 5^1\times {\mathrm{683}}^1\times {\mathrm{1597}}^1$

素因数の和:2289

約数の個数: 24

約数和(自身を含む): 45907344

約数和(自身を除く): 24092324

約数列:

[1, 2, 4, 5, 10, 20, 683, 1366, 1597, 2732, 3194, 3415, 6388, 6830, 7985, 13660, 15970, 31940, 1090751, 2181502, 4363004, 5453755, 10907510, 21815020]

約数ペア:

[(1, 21815020), (2, 10907510), (4, 5453755), (5, 4363004), (10, 2181502), (20, 1090751), (683, 31940), (1366, 15970), (1597, 13660), (2732, 7985), (3194, 6830), (3415, 6388)]