28216825

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 43886080

約数和(自身を除く): 15669255

約数列:

[1, 5, 7, 13, 25, 35, 65, 79, 91, 157, 175, 325, 395, 455, 553, 785, 1027, 1099, 1975, 2041, 2275, 2765, 3925, 5135, 5495, 7189, 10205, 12403, 13825, 14287, 25675, 27475, 35945, 51025, 62015, 71435, 86821, 161239, 179725, 310075, 357175, 434105, 806195, 1128673, 2170525, 4030975, 5643365, 28216825]

約数ペア:

[(1, 28216825), (5, 5643365), (7, 4030975), (13, 2170525), (25, 1128673), (35, 806195), (65, 434105), (79, 357175), (91, 310075), (157, 179725), (175, 161239), (325, 86821), (395, 71435), (455, 62015), (553, 51025), (785, 35945), (1027, 27475), (1099, 25675), (1975, 14287), (2041, 13825), (2275, 12403), (2765, 10205), (3925, 7189), (5135, 5495)]