21661240

素因数分解:

$2^3\times 5^1\times {\mathrm{541531}}^1$

素因数の和:541542

約数の個数: 16

約数和(自身を含む): 48737880

約数和(自身を除く): 27076640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541531, 1083062, 2166124, 2707655, 4332248, 5415310, 10830620, 21661240]

約数ペア:

[(1, 21661240), (2, 10830620), (4, 5415310), (5, 4332248), (8, 2707655), (10, 2166124), (20, 1083062), (40, 541531)]