21382880

素因数分解:

$2^5\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1249}}^1$

素因数の和:1371

約数の個数: 48

約数和(自身を含む): 51030000

約数和(自身を除く): 29647120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 107, 160, 214, 428, 535, 856, 1070, 1249, 1712, 2140, 2498, 3424, 4280, 4996, 6245, 8560, 9992, 12490, 17120, 19984, 24980, 39968, 49960, 99920, 133643, 199840, 267286, 534572, 668215, 1069144, 1336430, 2138288, 2672860, 4276576, 5345720, 10691440, 21382880]

約数ペア:

[(1, 21382880), (2, 10691440), (4, 5345720), (5, 4276576), (8, 2672860), (10, 2138288), (16, 1336430), (20, 1069144), (32, 668215), (40, 534572), (80, 267286), (107, 199840), (160, 133643), (214, 99920), (428, 49960), (535, 39968), (856, 24980), (1070, 19984), (1249, 17120), (1712, 12490), (2140, 9992), (2498, 8560), (3424, 6245), (4280, 4996)]