19902575

素因数分解:

$5^2\times 7^3\times {\mathrm{11}}^1\times {\mathrm{211}}^1$

素因数の和:253

約数の個数: 48

約数和(自身を含む): 31545600

約数和(自身を除く): 11643025

約数列:

[1, 5, 7, 11, 25, 35, 49, 55, 77, 175, 211, 245, 275, 343, 385, 539, 1055, 1225, 1477, 1715, 1925, 2321, 2695, 3773, 5275, 7385, 8575, 10339, 11605, 13475, 16247, 18865, 36925, 51695, 58025, 72373, 81235, 94325, 113729, 258475, 361865, 406175, 568645, 796103, 1809325, 2843225, 3980515, 19902575]

約数ペア:

[(1, 19902575), (5, 3980515), (7, 2843225), (11, 1809325), (25, 796103), (35, 568645), (49, 406175), (55, 361865), (77, 258475), (175, 113729), (211, 94325), (245, 81235), (275, 72373), (343, 58025), (385, 51695), (539, 36925), (1055, 18865), (1225, 16247), (1477, 13475), (1715, 11605), (1925, 10339), (2321, 8575), (2695, 7385), (3773, 5275)]