21002575

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:216

約数の個数: 36

約数和(自身を含む): 29388744

約数和(自身を除く): 8386169

約数列:

[1, 5, 11, 25, 53, 55, 121, 131, 265, 275, 583, 605, 655, 1325, 1441, 2915, 3025, 3275, 6413, 6943, 7205, 14575, 15851, 32065, 34715, 36025, 76373, 79255, 160325, 173575, 381865, 396275, 840103, 1909325, 4200515, 21002575]

約数ペア:

[(1, 21002575), (5, 4200515), (11, 1909325), (25, 840103), (53, 396275), (55, 381865), (121, 173575), (131, 160325), (265, 79255), (275, 76373), (583, 36025), (605, 34715), (655, 32065), (1325, 15851), (1441, 14575), (2915, 7205), (3025, 6943), (3275, 6413)]