21238315

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3769}}^1$

素因数の和:3811

約数の個数: 24

約数和(自身を含む): 30944160

約数和(自身を除く): 9705845

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 805, 1127, 3769, 5635, 18845, 26383, 86687, 131915, 184681, 433435, 606809, 923405, 3034045, 4247663, 21238315]

約数ペア:

[(1, 21238315), (5, 4247663), (7, 3034045), (23, 923405), (35, 606809), (49, 433435), (115, 184681), (161, 131915), (245, 86687), (805, 26383), (1127, 18845), (3769, 5635)]