18020425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{389}}^1$

素因数の和:525

約数の個数: 24

約数和(自身を含む): 23938200

約数和(自身を除く): 5917775

約数列:

[1, 5, 17, 25, 85, 109, 389, 425, 545, 1853, 1945, 2725, 6613, 9265, 9725, 33065, 42401, 46325, 165325, 212005, 720817, 1060025, 3604085, 18020425]

約数ペア:

[(1, 18020425), (5, 3604085), (17, 1060025), (25, 720817), (85, 212005), (109, 165325), (389, 46325), (425, 42401), (545, 33065), (1853, 9725), (1945, 9265), (2725, 6613)]