18243875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:240

約数の個数: 32

約数和(自身を含む): 24984960

約数和(自身を除く): 6741085

約数列:

[1, 5, 13, 25, 65, 103, 109, 125, 325, 515, 545, 1339, 1417, 1625, 2575, 2725, 6695, 7085, 11227, 12875, 13625, 33475, 35425, 56135, 145951, 167375, 177125, 280675, 729755, 1403375, 3648775, 18243875]

約数ペア:

[(1, 18243875), (5, 3648775), (13, 1403375), (25, 729755), (65, 280675), (103, 177125), (109, 167375), (125, 145951), (325, 56135), (515, 35425), (545, 33475), (1339, 13625), (1417, 12875), (1625, 11227), (2575, 7085), (2725, 6695)]