21386001

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1$

素因数の和:99

約数の個数: 72

約数和(自身を含む): 38916864

約数和(自身を除く): 17530863

約数列:

[1, 3, 7, 13, 19, 21, 31, 39, 49, 57, 91, 93, 133, 147, 217, 247, 273, 361, 399, 403, 589, 637, 651, 741, 931, 1083, 1209, 1519, 1729, 1767, 1911, 2527, 2793, 2821, 4123, 4557, 4693, 5187, 7581, 7657, 8463, 11191, 12103, 12369, 14079, 17689, 19747, 22971, 28861, 32851, 33573, 36309, 53067, 53599, 59241, 78337, 86583, 98553, 145483, 160797, 229957, 235011, 375193, 436449, 548359, 689871, 1018381, 1125579, 1645077, 3055143, 7128667, 21386001]

約数ペア:

[(1, 21386001), (3, 7128667), (7, 3055143), (13, 1645077), (19, 1125579), (21, 1018381), (31, 689871), (39, 548359), (49, 436449), (57, 375193), (91, 235011), (93, 229957), (133, 160797), (147, 145483), (217, 98553), (247, 86583), (273, 78337), (361, 59241), (399, 53599), (403, 53067), (589, 36309), (637, 33573), (651, 32851), (741, 28861), (931, 22971), (1083, 19747), (1209, 17689), (1519, 14079), (1729, 12369), (1767, 12103), (1911, 11191), (2527, 8463), (2793, 7657), (2821, 7581), (4123, 5187), (4557, 4693)]