20747905

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{443}}^1$

素因数の和:513

約数の個数: 32

約数和(自身を含む): 28771200

約数和(自身を除く): 8023295

約数列:

[1, 5, 17, 19, 29, 85, 95, 145, 323, 443, 493, 551, 1615, 2215, 2465, 2755, 7531, 8417, 9367, 12847, 37655, 42085, 46835, 64235, 143089, 218399, 244093, 715445, 1091995, 1220465, 4149581, 20747905]

約数ペア:

[(1, 20747905), (5, 4149581), (17, 1220465), (19, 1091995), (29, 715445), (85, 244093), (95, 218399), (145, 143089), (323, 64235), (443, 46835), (493, 42085), (551, 37655), (1615, 12847), (2215, 9367), (2465, 8417), (2755, 7531)]