218124580

素因数分解:

$2^2\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{8461}}^1$

素因数の和:9759

約数の個数: 24

約数和(自身を含む): 458471160

約数和(自身を除く): 240346580

約数列:

[1, 2, 4, 5, 10, 20, 1289, 2578, 5156, 6445, 8461, 12890, 16922, 25780, 33844, 42305, 84610, 169220, 10906229, 21812458, 43624916, 54531145, 109062290, 218124580]

約数ペア:

[(1, 218124580), (2, 109062290), (4, 54531145), (5, 43624916), (10, 21812458), (20, 10906229), (1289, 169220), (2578, 84610), (5156, 42305), (6445, 33844), (8461, 25780), (12890, 16922)]