21228714

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{353}}^1$

素因数の和:631

約数の個数: 48

約数和(自身を含む): 49867272

約数和(自身を除く): 28638558

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 234, 257, 353, 514, 706, 771, 1059, 1542, 2118, 2313, 3177, 3341, 4589, 4626, 6354, 6682, 9178, 10023, 13767, 20046, 27534, 30069, 41301, 60138, 82602, 90721, 181442, 272163, 544326, 816489, 1179373, 1632978, 2358746, 3538119, 7076238, 10614357, 21228714]

約数ペア:

[(1, 21228714), (2, 10614357), (3, 7076238), (6, 3538119), (9, 2358746), (13, 1632978), (18, 1179373), (26, 816489), (39, 544326), (78, 272163), (117, 181442), (234, 90721), (257, 82602), (353, 60138), (514, 41301), (706, 30069), (771, 27534), (1059, 20046), (1542, 13767), (2118, 10023), (2313, 9178), (3177, 6682), (3341, 6354), (4589, 4626)]