21455945

素因数分解:

$5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{2749}}^1$

素因数の和:2984

約数の個数: 16

約数和(自身を含む): 29568000

約数和(自身を除く): 8112055

約数列:

[1, 5, 7, 35, 223, 1115, 1561, 2749, 7805, 13745, 19243, 96215, 613027, 3065135, 4291189, 21455945]

約数ペア:

[(1, 21455945), (5, 4291189), (7, 3065135), (35, 613027), (223, 96215), (1115, 19243), (1561, 13745), (2749, 7805)]