19814375

素因数分解:

$5^4\times 7^2\times {\mathrm{647}}^1$

素因数の和:681

約数の個数: 30

約数和(自身を含む): 28847016

約数和(自身を除く): 9032641

約数列:

[1, 5, 7, 25, 35, 49, 125, 175, 245, 625, 647, 875, 1225, 3235, 4375, 4529, 6125, 16175, 22645, 30625, 31703, 80875, 113225, 158515, 404375, 566125, 792575, 2830625, 3962875, 19814375]

約数ペア:

[(1, 19814375), (5, 3962875), (7, 2830625), (25, 792575), (35, 566125), (49, 404375), (125, 158515), (175, 113225), (245, 80875), (625, 31703), (647, 30625), (875, 22645), (1225, 16175), (3235, 6125), (4375, 4529)]