918519020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{421339}}^1$

素因数の和:421457

約数の個数: 24

約数和(自身を含む): 1946590800

約数和(自身を除く): 1028071780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 421339, 842678, 1685356, 2106695, 4213390, 8426780, 45925951, 91851902, 183703804, 229629755, 459259510, 918519020]

約数ペア:

[(1, 918519020), (2, 459259510), (4, 229629755), (5, 183703804), (10, 91851902), (20, 45925951), (109, 8426780), (218, 4213390), (436, 2106695), (545, 1685356), (1090, 842678), (2180, 421339)]