21271420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62563}}^1$

素因数の和:62589

約数の個数: 24

約数和(自身を含む): 47298384

約数和(自身を除く): 26026964

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62563, 125126, 250252, 312815, 625630, 1063571, 1251260, 2127142, 4254284, 5317855, 10635710, 21271420]

約数ペア:

[(1, 21271420), (2, 10635710), (4, 5317855), (5, 4254284), (10, 2127142), (17, 1251260), (20, 1063571), (34, 625630), (68, 312815), (85, 250252), (170, 125126), (340, 62563)]