21676473

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 41496000

約数和(自身を除く): 19819527

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 49, 57, 63, 91, 117, 133, 147, 171, 199, 247, 273, 399, 441, 597, 637, 741, 819, 931, 1197, 1393, 1729, 1791, 1911, 2223, 2587, 2793, 3781, 4179, 5187, 5733, 7761, 8379, 9751, 11343, 12103, 12537, 15561, 18109, 23283, 26467, 29253, 34029, 36309, 49153, 54327, 79401, 87759, 108927, 126763, 147459, 162981, 185269, 238203, 344071, 380289, 442377, 555807, 1032213, 1140867, 1667421, 2408497, 3096639, 7225491, 21676473]

約数ペア:

[(1, 21676473), (3, 7225491), (7, 3096639), (9, 2408497), (13, 1667421), (19, 1140867), (21, 1032213), (39, 555807), (49, 442377), (57, 380289), (63, 344071), (91, 238203), (117, 185269), (133, 162981), (147, 147459), (171, 126763), (199, 108927), (247, 87759), (273, 79401), (399, 54327), (441, 49153), (597, 36309), (637, 34029), (741, 29253), (819, 26467), (931, 23283), (1197, 18109), (1393, 15561), (1729, 12537), (1791, 12103), (1911, 11343), (2223, 9751), (2587, 8379), (2793, 7761), (3781, 5733), (4179, 5187)]