21156984

素因数分解:

$2^3\times 3^3\times {\mathrm{41}}^1\times {\mathrm{2389}}^1$

素因数の和:2445

約数の個数: 64

約数和(自身を含む): 60228000

約数和(自身を除く): 39071016

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 41, 54, 72, 82, 108, 123, 164, 216, 246, 328, 369, 492, 738, 984, 1107, 1476, 2214, 2389, 2952, 4428, 4778, 7167, 8856, 9556, 14334, 19112, 21501, 28668, 43002, 57336, 64503, 86004, 97949, 129006, 172008, 195898, 258012, 293847, 391796, 516024, 587694, 783592, 881541, 1175388, 1763082, 2350776, 2644623, 3526164, 5289246, 7052328, 10578492, 21156984]

約数ペア:

[(1, 21156984), (2, 10578492), (3, 7052328), (4, 5289246), (6, 3526164), (8, 2644623), (9, 2350776), (12, 1763082), (18, 1175388), (24, 881541), (27, 783592), (36, 587694), (41, 516024), (54, 391796), (72, 293847), (82, 258012), (108, 195898), (123, 172008), (164, 129006), (216, 97949), (246, 86004), (328, 64503), (369, 57336), (492, 43002), (738, 28668), (984, 21501), (1107, 19112), (1476, 14334), (2214, 9556), (2389, 8856), (2952, 7167), (4428, 4778)]