21976155

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1249}}^1$

素因数の和:1300

約数の個数: 48

約数和(自身を含む): 42120000

約数和(自身を除く): 20143845

約数列:

[1, 3, 5, 9, 15, 17, 23, 45, 51, 69, 85, 115, 153, 207, 255, 345, 391, 765, 1035, 1173, 1249, 1955, 3519, 3747, 5865, 6245, 11241, 17595, 18735, 21233, 28727, 56205, 63699, 86181, 106165, 143635, 191097, 258543, 318495, 430905, 488359, 955485, 1292715, 1465077, 2441795, 4395231, 7325385, 21976155]

約数ペア:

[(1, 21976155), (3, 7325385), (5, 4395231), (9, 2441795), (15, 1465077), (17, 1292715), (23, 955485), (45, 488359), (51, 430905), (69, 318495), (85, 258543), (115, 191097), (153, 143635), (207, 106165), (255, 86181), (345, 63699), (391, 56205), (765, 28727), (1035, 21233), (1173, 18735), (1249, 17595), (1955, 11241), (3519, 6245), (3747, 5865)]