21339920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{719}}^1$

素因数の和:792

約数の個数: 80

約数和(自身を含む): 57853440

約数和(自身を除く): 36513520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 53, 56, 70, 80, 106, 112, 140, 212, 265, 280, 371, 424, 530, 560, 719, 742, 848, 1060, 1438, 1484, 1855, 2120, 2876, 2968, 3595, 3710, 4240, 5033, 5752, 5936, 7190, 7420, 10066, 11504, 14380, 14840, 20132, 25165, 28760, 29680, 38107, 40264, 50330, 57520, 76214, 80528, 100660, 152428, 190535, 201320, 266749, 304856, 381070, 402640, 533498, 609712, 762140, 1066996, 1333745, 1524280, 2133992, 2667490, 3048560, 4267984, 5334980, 10669960, 21339920]

約数ペア:

[(1, 21339920), (2, 10669960), (4, 5334980), (5, 4267984), (7, 3048560), (8, 2667490), (10, 2133992), (14, 1524280), (16, 1333745), (20, 1066996), (28, 762140), (35, 609712), (40, 533498), (53, 402640), (56, 381070), (70, 304856), (80, 266749), (106, 201320), (112, 190535), (140, 152428), (212, 100660), (265, 80528), (280, 76214), (371, 57520), (424, 50330), (530, 40264), (560, 38107), (719, 29680), (742, 28760), (848, 25165), (1060, 20132), (1438, 14840), (1484, 14380), (1855, 11504), (2120, 10066), (2876, 7420), (2968, 7190), (3595, 5936), (3710, 5752), (4240, 5033)]