18972920

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1433}}^1$

素因数の和:1775

約数の個数: 32

約数和(自身を含む): 42847920

約数和(自身を除く): 23875000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1433, 1655, 2648, 2866, 3310, 5732, 6620, 7165, 11464, 13240, 14330, 28660, 57320, 474323, 948646, 1897292, 2371615, 3794584, 4743230, 9486460, 18972920]

約数ペア:

[(1, 18972920), (2, 9486460), (4, 4743230), (5, 3794584), (8, 2371615), (10, 1897292), (20, 948646), (40, 474323), (331, 57320), (662, 28660), (1324, 14330), (1433, 13240), (1655, 11464), (2648, 7165), (2866, 6620), (3310, 5732)]