21395080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1777}}^1$

素因数の和:1838

約数の個数: 64

約数和(自身を含む): 56327040

約数和(自身を除く): 34931960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1720, 1777, 2408, 3010, 3554, 6020, 7108, 8885, 12040, 12439, 14216, 17770, 24878, 35540, 49756, 62195, 71080, 76411, 99512, 124390, 152822, 248780, 305644, 382055, 497560, 534877, 611288, 764110, 1069754, 1528220, 2139508, 2674385, 3056440, 4279016, 5348770, 10697540, 21395080]

約数ペア:

[(1, 21395080), (2, 10697540), (4, 5348770), (5, 4279016), (7, 3056440), (8, 2674385), (10, 2139508), (14, 1528220), (20, 1069754), (28, 764110), (35, 611288), (40, 534877), (43, 497560), (56, 382055), (70, 305644), (86, 248780), (140, 152822), (172, 124390), (215, 99512), (280, 76411), (301, 71080), (344, 62195), (430, 49756), (602, 35540), (860, 24878), (1204, 17770), (1505, 14216), (1720, 12439), (1777, 12040), (2408, 8885), (3010, 7108), (3554, 6020)]