18861325

素因数分解:

$5^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:286

約数の個数: 36

約数和(自身を含む): 27671220

約数和(自身を除く): 8809895

約数列:

[1, 5, 7, 25, 35, 49, 89, 173, 175, 245, 445, 623, 865, 1211, 1225, 2225, 3115, 4325, 4361, 6055, 8477, 15397, 15575, 21805, 30275, 42385, 76985, 107779, 109025, 211925, 384925, 538895, 754453, 2694475, 3772265, 18861325]

約数ペア:

[(1, 18861325), (5, 3772265), (7, 2694475), (25, 754453), (35, 538895), (49, 384925), (89, 211925), (173, 109025), (175, 107779), (245, 76985), (445, 42385), (623, 30275), (865, 21805), (1211, 15575), (1225, 15397), (2225, 8477), (3115, 6055), (4325, 4361)]