19910415

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{263}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 37559808

約数和(自身を除く): 17649393

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 103, 105, 147, 245, 263, 309, 515, 721, 735, 789, 1315, 1545, 1841, 2163, 3605, 3945, 5047, 5523, 9205, 10815, 12887, 15141, 25235, 27089, 27615, 38661, 64435, 75705, 81267, 135445, 189623, 193305, 406335, 568869, 948115, 1327361, 2844345, 3982083, 6636805, 19910415]

約数ペア:

[(1, 19910415), (3, 6636805), (5, 3982083), (7, 2844345), (15, 1327361), (21, 948115), (35, 568869), (49, 406335), (103, 193305), (105, 189623), (147, 135445), (245, 81267), (263, 75705), (309, 64435), (515, 38661), (721, 27615), (735, 27089), (789, 25235), (1315, 15141), (1545, 12887), (1841, 10815), (2163, 9205), (3605, 5523), (3945, 5047)]