21518540

素因数分解:

$2^2\times 5^1\times {\mathrm{827}}^1\times {\mathrm{1301}}^1$

素因数の和:2137

約数の個数: 24

約数和(自身を含む): 45278352

約数和(自身を除く): 23759812

約数列:

[1, 2, 4, 5, 10, 20, 827, 1301, 1654, 2602, 3308, 4135, 5204, 6505, 8270, 13010, 16540, 26020, 1075927, 2151854, 4303708, 5379635, 10759270, 21518540]

約数ペア:

[(1, 21518540), (2, 10759270), (4, 5379635), (5, 4303708), (10, 2151854), (20, 1075927), (827, 26020), (1301, 16540), (1654, 13010), (2602, 8270), (3308, 6505), (4135, 5204)]