20898850

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{29}}^2\times {\mathrm{71}}^1$

素因数の和:148

約数の個数: 72

約数和(自身を含む): 46657728

約数和(自身を除く): 25758878

約数列:

[1, 2, 5, 7, 10, 14, 25, 29, 35, 50, 58, 70, 71, 142, 145, 175, 203, 290, 350, 355, 406, 497, 710, 725, 841, 994, 1015, 1450, 1682, 1775, 2030, 2059, 2485, 3550, 4118, 4205, 4970, 5075, 5887, 8410, 10150, 10295, 11774, 12425, 14413, 20590, 21025, 24850, 28826, 29435, 42050, 51475, 58870, 59711, 72065, 102950, 119422, 144130, 147175, 294350, 298555, 360325, 417977, 597110, 720650, 835954, 1492775, 2089885, 2985550, 4179770, 10449425, 20898850]

約数ペア:

[(1, 20898850), (2, 10449425), (5, 4179770), (7, 2985550), (10, 2089885), (14, 1492775), (25, 835954), (29, 720650), (35, 597110), (50, 417977), (58, 360325), (70, 298555), (71, 294350), (142, 147175), (145, 144130), (175, 119422), (203, 102950), (290, 72065), (350, 59711), (355, 58870), (406, 51475), (497, 42050), (710, 29435), (725, 28826), (841, 24850), (994, 21025), (1015, 20590), (1450, 14413), (1682, 12425), (1775, 11774), (2030, 10295), (2059, 10150), (2485, 8410), (3550, 5887), (4118, 5075), (4205, 4970)]