18220475

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8009}}^1$

素因数の和:8039

約数の個数: 24

約数和(自身を含む): 27810720

約数和(自身を除く): 9590245

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 8009, 40045, 56063, 104117, 200225, 280315, 520585, 728819, 1401575, 2602925, 3644095, 18220475]

約数ペア:

[(1, 18220475), (5, 3644095), (7, 2602925), (13, 1401575), (25, 728819), (35, 520585), (65, 280315), (91, 200225), (175, 104117), (325, 56063), (455, 40045), (2275, 8009)]