638631441

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{215681}}^1$

素因数の和:215741

約数の個数: 24

約数和(自身を含む): 1076684544

約数和(自身を除く): 438053103

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 215681, 647043, 1509767, 1941129, 4529301, 10137007, 13587903, 30411021, 70959049, 91233063, 212877147, 638631441]

約数ペア:

[(1, 638631441), (3, 212877147), (7, 91233063), (9, 70959049), (21, 30411021), (47, 13587903), (63, 10137007), (141, 4529301), (329, 1941129), (423, 1509767), (987, 647043), (2961, 215681)]