19691875

素因数分解:

$5^4\times 7^2\times {\mathrm{643}}^1$

素因数の和:677

約数の個数: 30

約数和(自身を含む): 28668948

約数和(自身を除く): 8977073

約数列:

[1, 5, 7, 25, 35, 49, 125, 175, 245, 625, 643, 875, 1225, 3215, 4375, 4501, 6125, 16075, 22505, 30625, 31507, 80375, 112525, 157535, 401875, 562625, 787675, 2813125, 3938375, 19691875]

約数ペア:

[(1, 19691875), (5, 3938375), (7, 2813125), (25, 787675), (35, 562625), (49, 401875), (125, 157535), (175, 112525), (245, 80375), (625, 31507), (643, 30625), (875, 22505), (1225, 16075), (3215, 6125), (4375, 4501)]