17990865

素因数分解:

$3^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{997}}^1$

素因数の和:1409

約数の個数: 24

約数和(自身を含む): 31293288

約数和(自身を除く): 13302423

約数列:

[1, 3, 5, 9, 15, 45, 401, 997, 1203, 2005, 2991, 3609, 4985, 6015, 8973, 14955, 18045, 44865, 399797, 1199391, 1998985, 3598173, 5996955, 17990865]

約数ペア:

[(1, 17990865), (3, 5996955), (5, 3598173), (9, 1998985), (15, 1199391), (45, 399797), (401, 44865), (997, 18045), (1203, 14955), (2005, 8973), (2991, 6015), (3609, 4985)]