18890440

素因数分解:

$2^3\times 5^1\times {\mathrm{472261}}^1$

素因数の和:472272

約数の個数: 16

約数和(自身を含む): 42503580

約数和(自身を除く): 23613140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 472261, 944522, 1889044, 2361305, 3778088, 4722610, 9445220, 18890440]

約数ペア:

[(1, 18890440), (2, 9445220), (4, 4722610), (5, 3778088), (8, 2361305), (10, 1889044), (20, 944522), (40, 472261)]