18840520

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1423}}^1$

素因数の和:1765

約数の個数: 32

約数和(自身を含む): 42549120

約数和(自身を除く): 23708600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1423, 1655, 2648, 2846, 3310, 5692, 6620, 7115, 11384, 13240, 14230, 28460, 56920, 471013, 942026, 1884052, 2355065, 3768104, 4710130, 9420260, 18840520]

約数ペア:

[(1, 18840520), (2, 9420260), (4, 4710130), (5, 3768104), (8, 2355065), (10, 1884052), (20, 942026), (40, 471013), (331, 56920), (662, 28460), (1324, 14230), (1423, 13240), (1655, 11384), (2648, 7115), (2846, 6620), (3310, 5692)]