21289810

素因数分解:

$2^1\times 5^1\times {\mathrm{223}}^1\times {\mathrm{9547}}^1$

素因数の和:9777

約数の個数: 16

約数和(自身を含む): 38497536

約数和(自身を除く): 17207726

約数列:

[1, 2, 5, 10, 223, 446, 1115, 2230, 9547, 19094, 47735, 95470, 2128981, 4257962, 10644905, 21289810]

約数ペア:

[(1, 21289810), (2, 10644905), (5, 4257962), (10, 2128981), (223, 95470), (446, 47735), (1115, 19094), (2230, 9547)]