21682745

素因数分解:

$5^1\times 7^3\times {\mathrm{47}}^1\times {\mathrm{269}}^1$

素因数の和:342

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 9421255

約数列:

[1, 5, 7, 35, 47, 49, 235, 245, 269, 329, 343, 1345, 1645, 1715, 1883, 2303, 9415, 11515, 12643, 13181, 16121, 63215, 65905, 80605, 88501, 92267, 442505, 461335, 619507, 3097535, 4336549, 21682745]

約数ペア:

[(1, 21682745), (5, 4336549), (7, 3097535), (35, 619507), (47, 461335), (49, 442505), (235, 92267), (245, 88501), (269, 80605), (329, 65905), (343, 63215), (1345, 16121), (1645, 13181), (1715, 12643), (1883, 11515), (2303, 9415)]