21573867

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 36197280

約数和(自身を除く): 14623413

約数列:

[1, 3, 7, 17, 21, 49, 51, 89, 97, 119, 147, 267, 291, 357, 623, 679, 833, 1513, 1649, 1869, 2037, 2499, 4361, 4539, 4753, 4947, 8633, 10591, 11543, 13083, 14259, 25899, 31773, 34629, 60431, 74137, 80801, 146761, 181293, 222411, 242403, 423017, 440283, 1027327, 1269051, 3081981, 7191289, 21573867]

約数ペア:

[(1, 21573867), (3, 7191289), (7, 3081981), (17, 1269051), (21, 1027327), (49, 440283), (51, 423017), (89, 242403), (97, 222411), (119, 181293), (147, 146761), (267, 80801), (291, 74137), (357, 60431), (623, 34629), (679, 31773), (833, 25899), (1513, 14259), (1649, 13083), (1869, 11543), (2037, 10591), (2499, 8633), (4361, 4947), (4539, 4753)]