21055212

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{431}}^1$

素因数の和:523

約数の個数: 72

約数和(自身を含む): 56609280

約数和(自身を除く): 35554068

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 59, 69, 92, 118, 138, 177, 207, 236, 276, 354, 414, 431, 531, 708, 828, 862, 1062, 1293, 1357, 1724, 2124, 2586, 2714, 3879, 4071, 5172, 5428, 7758, 8142, 9913, 12213, 15516, 16284, 19826, 24426, 25429, 29739, 39652, 48852, 50858, 59478, 76287, 89217, 101716, 118956, 152574, 178434, 228861, 305148, 356868, 457722, 584867, 915444, 1169734, 1754601, 2339468, 3509202, 5263803, 7018404, 10527606, 21055212]

約数ペア:

[(1, 21055212), (2, 10527606), (3, 7018404), (4, 5263803), (6, 3509202), (9, 2339468), (12, 1754601), (18, 1169734), (23, 915444), (36, 584867), (46, 457722), (59, 356868), (69, 305148), (92, 228861), (118, 178434), (138, 152574), (177, 118956), (207, 101716), (236, 89217), (276, 76287), (354, 59478), (414, 50858), (431, 48852), (531, 39652), (708, 29739), (828, 25429), (862, 24426), (1062, 19826), (1293, 16284), (1357, 15516), (1724, 12213), (2124, 9913), (2586, 8142), (2714, 7758), (3879, 5428), (4071, 5172)]