21000514808

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{613763}}^1$

素因数の和:613836

約数の個数: 64

約数和(自身を含む): 49493928960

約数和(自身を除く): 28493414152

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 47, 52, 56, 91, 94, 104, 182, 188, 329, 364, 376, 611, 658, 728, 1222, 1316, 2444, 2632, 4277, 4888, 8554, 17108, 34216, 613763, 1227526, 2455052, 4296341, 4910104, 7978919, 8592682, 15957838, 17185364, 28846861, 31915676, 34370728, 55852433, 57693722, 63831352, 111704866, 115387444, 201928027, 223409732, 230774888, 375009193, 403856054, 446819464, 750018386, 807712108, 1500036772, 1615424216, 2625064351, 3000073544, 5250128702, 10500257404, 21000514808]

約数ペア:

[(1, 21000514808), (2, 10500257404), (4, 5250128702), (7, 3000073544), (8, 2625064351), (13, 1615424216), (14, 1500036772), (26, 807712108), (28, 750018386), (47, 446819464), (52, 403856054), (56, 375009193), (91, 230774888), (94, 223409732), (104, 201928027), (182, 115387444), (188, 111704866), (329, 63831352), (364, 57693722), (376, 55852433), (611, 34370728), (658, 31915676), (728, 28846861), (1222, 17185364), (1316, 15957838), (2444, 8592682), (2632, 7978919), (4277, 4910104), (4888, 4296341), (8554, 2455052), (17108, 1227526), (34216, 613763)]