19910660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1847}}^1$

素因数の和:1881

約数の個数: 72

約数和(自身を含む): 53089344

約数和(自身を除く): 33178684

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 980, 1078, 1540, 1847, 2156, 2695, 3694, 5390, 7388, 9235, 10780, 12929, 18470, 20317, 25858, 36940, 40634, 51716, 64645, 81268, 90503, 101585, 129290, 142219, 181006, 203170, 258580, 284438, 362012, 406340, 452515, 568876, 711095, 905030, 995533, 1422190, 1810060, 1991066, 2844380, 3982132, 4977665, 9955330, 19910660]

約数ペア:

[(1, 19910660), (2, 9955330), (4, 4977665), (5, 3982132), (7, 2844380), (10, 1991066), (11, 1810060), (14, 1422190), (20, 995533), (22, 905030), (28, 711095), (35, 568876), (44, 452515), (49, 406340), (55, 362012), (70, 284438), (77, 258580), (98, 203170), (110, 181006), (140, 142219), (154, 129290), (196, 101585), (220, 90503), (245, 81268), (308, 64645), (385, 51716), (490, 40634), (539, 36940), (770, 25858), (980, 20317), (1078, 18470), (1540, 12929), (1847, 10780), (2156, 9235), (2695, 7388), (3694, 5390)]