18973780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1019}}^1$

素因数の和:1061

約数の個数: 72

約数和(自身を含む): 48837600

約数和(自身を除く): 29863820

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 980, 1019, 1330, 1862, 2038, 2660, 3724, 4076, 4655, 5095, 7133, 9310, 10190, 14266, 18620, 19361, 20380, 28532, 35665, 38722, 49931, 71330, 77444, 96805, 99862, 135527, 142660, 193610, 199724, 249655, 271054, 387220, 499310, 542108, 677635, 948689, 998620, 1355270, 1897378, 2710540, 3794756, 4743445, 9486890, 18973780]

約数ペア:

[(1, 18973780), (2, 9486890), (4, 4743445), (5, 3794756), (7, 2710540), (10, 1897378), (14, 1355270), (19, 998620), (20, 948689), (28, 677635), (35, 542108), (38, 499310), (49, 387220), (70, 271054), (76, 249655), (95, 199724), (98, 193610), (133, 142660), (140, 135527), (190, 99862), (196, 96805), (245, 77444), (266, 71330), (380, 49931), (490, 38722), (532, 35665), (665, 28532), (931, 20380), (980, 19361), (1019, 18620), (1330, 14266), (1862, 10190), (2038, 9310), (2660, 7133), (3724, 5095), (4076, 4655)]