18685975

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{571}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 30640896

約数和(自身を除く): 11954921

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 77, 85, 119, 175, 187, 275, 385, 425, 571, 595, 935, 1309, 1925, 2855, 2975, 3997, 4675, 6281, 6545, 9707, 14275, 19985, 31405, 32725, 43967, 48535, 67949, 99925, 106777, 157025, 219835, 242675, 339745, 533885, 747439, 1099175, 1698725, 2669425, 3737195, 18685975]

約数ペア:

[(1, 18685975), (5, 3737195), (7, 2669425), (11, 1698725), (17, 1099175), (25, 747439), (35, 533885), (55, 339745), (77, 242675), (85, 219835), (119, 157025), (175, 106777), (187, 99925), (275, 67949), (385, 48535), (425, 43967), (571, 32725), (595, 31405), (935, 19985), (1309, 14275), (1925, 9707), (2855, 6545), (2975, 6281), (3997, 4675)]