18880225

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 29636992

約数和(自身を除く): 10756767

約数列:

[1, 5, 7, 13, 25, 35, 43, 65, 91, 175, 193, 215, 301, 325, 455, 559, 965, 1075, 1351, 1505, 2275, 2509, 2795, 3913, 4825, 6755, 7525, 8299, 12545, 13975, 17563, 19565, 33775, 41495, 58093, 62725, 87815, 97825, 107887, 207475, 290465, 439075, 539435, 755209, 1452325, 2697175, 3776045, 18880225]

約数ペア:

[(1, 18880225), (5, 3776045), (7, 2697175), (13, 1452325), (25, 755209), (35, 539435), (43, 439075), (65, 290465), (91, 207475), (175, 107887), (193, 97825), (215, 87815), (301, 62725), (325, 58093), (455, 41495), (559, 33775), (965, 19565), (1075, 17563), (1351, 13975), (1505, 12545), (2275, 8299), (2509, 7525), (2795, 6755), (3913, 4825)]