21373555

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3793}}^1$

素因数の和:3835

約数の個数: 24

約数和(自身を含む): 31141152

約数和(自身を除く): 9767597

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 805, 1127, 3793, 5635, 18965, 26551, 87239, 132755, 185857, 436195, 610673, 929285, 3053365, 4274711, 21373555]

約数ペア:

[(1, 21373555), (5, 4274711), (7, 3053365), (23, 929285), (35, 610673), (49, 436195), (115, 185857), (161, 132755), (245, 87239), (805, 26551), (1127, 18965), (3793, 5635)]