21151760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{353}}^1$

素因数の和:480

約数の個数: 80

約数和(自身を含む): 56889216

約数和(自身を除く): 35737456

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 107, 112, 140, 214, 280, 353, 428, 535, 560, 706, 749, 856, 1070, 1412, 1498, 1712, 1765, 2140, 2471, 2824, 2996, 3530, 3745, 4280, 4942, 5648, 5992, 7060, 7490, 8560, 9884, 11984, 12355, 14120, 14980, 19768, 24710, 28240, 29960, 37771, 39536, 49420, 59920, 75542, 98840, 151084, 188855, 197680, 264397, 302168, 377710, 528794, 604336, 755420, 1057588, 1321985, 1510840, 2115176, 2643970, 3021680, 4230352, 5287940, 10575880, 21151760]

約数ペア:

[(1, 21151760), (2, 10575880), (4, 5287940), (5, 4230352), (7, 3021680), (8, 2643970), (10, 2115176), (14, 1510840), (16, 1321985), (20, 1057588), (28, 755420), (35, 604336), (40, 528794), (56, 377710), (70, 302168), (80, 264397), (107, 197680), (112, 188855), (140, 151084), (214, 98840), (280, 75542), (353, 59920), (428, 49420), (535, 39536), (560, 37771), (706, 29960), (749, 28240), (856, 24710), (1070, 19768), (1412, 14980), (1498, 14120), (1712, 12355), (1765, 11984), (2140, 9884), (2471, 8560), (2824, 7490), (2996, 7060), (3530, 5992), (3745, 5648), (4280, 4942)]