18487975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 27141120

約数和(自身を除く): 8653145

約数列:

[1, 5, 11, 23, 25, 37, 55, 79, 115, 185, 253, 275, 395, 407, 575, 851, 869, 925, 1265, 1817, 1975, 2035, 2923, 4255, 4345, 6325, 9085, 9361, 10175, 14615, 19987, 21275, 21725, 32153, 45425, 46805, 67229, 73075, 99935, 160765, 234025, 336145, 499675, 739519, 803825, 1680725, 3697595, 18487975]

約数ペア:

[(1, 18487975), (5, 3697595), (11, 1680725), (23, 803825), (25, 739519), (37, 499675), (55, 336145), (79, 234025), (115, 160765), (185, 99935), (253, 73075), (275, 67229), (395, 46805), (407, 45425), (575, 32153), (851, 21725), (869, 21275), (925, 19987), (1265, 14615), (1817, 10175), (1975, 9361), (2035, 9085), (2923, 6325), (4255, 4345)]