1998125

素因数分解:

$5^4\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:182

約数の個数: 20

約数和(自身を含む): 2624160

約数和(自身を除く): 626035

約数列:

[1, 5, 23, 25, 115, 125, 139, 575, 625, 695, 2875, 3197, 3475, 14375, 15985, 17375, 79925, 86875, 399625, 1998125]

約数ペア:

[(1, 1998125), (5, 399625), (23, 86875), (25, 79925), (115, 17375), (125, 15985), (139, 14375), (575, 3475), (625, 3197), (695, 2875)]