21225040

素因数分解:

$2^4\times 5^1\times {\mathrm{265313}}^1$

素因数の和:265326

約数の個数: 20

約数和(自身を含む): 49348404

約数和(自身を除く): 28123364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265313, 530626, 1061252, 1326565, 2122504, 2653130, 4245008, 5306260, 10612520, 21225040]

約数ペア:

[(1, 21225040), (2, 10612520), (4, 5306260), (5, 4245008), (8, 2653130), (10, 2122504), (16, 1326565), (20, 1061252), (40, 530626), (80, 265313)]