21055203

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:268

約数の個数: 36

約数和(自身を含む): 33496320

約数和(自身を除く): 12441117

約数列:

[1, 3, 9, 13, 39, 109, 117, 127, 169, 327, 381, 507, 981, 1143, 1417, 1521, 1651, 4251, 4953, 12753, 13843, 14859, 18421, 21463, 41529, 55263, 64389, 124587, 165789, 179959, 193167, 539877, 1619631, 2339467, 7018401, 21055203]

約数ペア:

[(1, 21055203), (3, 7018401), (9, 2339467), (13, 1619631), (39, 539877), (109, 193167), (117, 179959), (127, 165789), (169, 124587), (327, 64389), (381, 55263), (507, 41529), (981, 21463), (1143, 18421), (1417, 14859), (1521, 13843), (1651, 12753), (4251, 4953)]