90426980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{645907}}^1$

素因数の和:645923

約数の個数: 24

約数和(自身を含む): 217025088

約数和(自身を除く): 126598108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 645907, 1291814, 2583628, 3229535, 4521349, 6459070, 9042698, 12918140, 18085396, 22606745, 45213490, 90426980]

約数ペア:

[(1, 90426980), (2, 45213490), (4, 22606745), (5, 18085396), (7, 12918140), (10, 9042698), (14, 6459070), (20, 4521349), (28, 3229535), (35, 2583628), (70, 1291814), (140, 645907)]