21303485

素因数分解:

$5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{977}}^1$

素因数の和:1085

約数の個数: 24

約数和(自身を含む): 30102840

約数和(自身を除く): 8799355

約数列:

[1, 5, 7, 35, 49, 89, 245, 445, 623, 977, 3115, 4361, 4885, 6839, 21805, 34195, 47873, 86953, 239365, 434765, 608671, 3043355, 4260697, 21303485]

約数ペア:

[(1, 21303485), (5, 4260697), (7, 3043355), (35, 608671), (49, 434765), (89, 239365), (245, 86953), (445, 47873), (623, 34195), (977, 21805), (3115, 6839), (4361, 4885)]