19904875

素因数分解:

$5^3\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1$

素因数の和:97

約数の個数: 48

約数和(自身を含む): 28735200

約数和(自身を除く): 8830325

約数列:

[1, 5, 17, 19, 25, 29, 85, 95, 125, 145, 289, 323, 425, 475, 493, 551, 725, 1445, 1615, 2125, 2375, 2465, 2755, 3625, 5491, 7225, 8075, 8381, 9367, 12325, 13775, 27455, 36125, 40375, 41905, 46835, 61625, 68875, 137275, 159239, 209525, 234175, 686375, 796195, 1047625, 1170875, 3980975, 19904875]

約数ペア:

[(1, 19904875), (5, 3980975), (17, 1170875), (19, 1047625), (25, 796195), (29, 686375), (85, 234175), (95, 209525), (125, 159239), (145, 137275), (289, 68875), (323, 61625), (425, 46835), (475, 41905), (493, 40375), (551, 36125), (725, 27455), (1445, 13775), (1615, 12325), (2125, 9367), (2375, 8381), (2465, 8075), (2755, 7225), (3625, 5491)]