18945875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:248

約数の個数: 32

約数和(自身を含む): 25945920

約数和(自身を除く): 7000045

約数列:

[1, 5, 13, 25, 65, 89, 125, 131, 325, 445, 655, 1157, 1625, 1703, 2225, 3275, 5785, 8515, 11125, 11659, 16375, 28925, 42575, 58295, 144625, 151567, 212875, 291475, 757835, 1457375, 3789175, 18945875]

約数ペア:

[(1, 18945875), (5, 3789175), (13, 1457375), (25, 757835), (65, 291475), (89, 212875), (125, 151567), (131, 144625), (325, 58295), (445, 42575), (655, 28925), (1157, 16375), (1625, 11659), (1703, 11125), (2225, 8515), (3275, 5785)]