19811420

素因数分解:

$2^2\times 5^1\times {\mathrm{541}}^1\times {\mathrm{1831}}^1$

素因数の和:2381

約数の個数: 24

約数和(自身を含む): 41703648

約数和(自身を除く): 21892228

約数列:

[1, 2, 4, 5, 10, 20, 541, 1082, 1831, 2164, 2705, 3662, 5410, 7324, 9155, 10820, 18310, 36620, 990571, 1981142, 3962284, 4952855, 9905710, 19811420]

約数ペア:

[(1, 19811420), (2, 9905710), (4, 4952855), (5, 3962284), (10, 1981142), (20, 990571), (541, 36620), (1082, 18310), (1831, 10820), (2164, 9155), (2705, 7324), (3662, 5410)]