18930275

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 29623104

約数和(自身を除く): 10692829

約数列:

[1, 5, 7, 13, 25, 35, 53, 65, 91, 157, 175, 265, 325, 371, 455, 689, 785, 1099, 1325, 1855, 2041, 2275, 3445, 3925, 4823, 5495, 8321, 9275, 10205, 14287, 17225, 24115, 27475, 41605, 51025, 58247, 71435, 108173, 120575, 208025, 291235, 357175, 540865, 757211, 1456175, 2704325, 3786055, 18930275]

約数ペア:

[(1, 18930275), (5, 3786055), (7, 2704325), (13, 1456175), (25, 757211), (35, 540865), (53, 357175), (65, 291235), (91, 208025), (157, 120575), (175, 108173), (265, 71435), (325, 58247), (371, 51025), (455, 41605), (689, 27475), (785, 24115), (1099, 17225), (1325, 14287), (1855, 10205), (2041, 9275), (2275, 8321), (3445, 5495), (3925, 4823)]