21221686075

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{557}}^1\times {\mathrm{571}}^1$

素因数の和:1312

約数の個数: 48

約数和(自身を含む): 28139832864

約数和(自身を除く): 6918146789

約数列:

[1, 5, 17, 25, 85, 157, 425, 557, 571, 785, 2669, 2785, 2855, 3925, 9469, 9707, 13345, 13925, 14275, 47345, 48535, 66725, 87449, 89647, 236725, 242675, 318047, 437245, 448235, 1486633, 1523999, 1590235, 2186225, 2241175, 5406799, 7433165, 7619995, 7951175, 27033995, 37165825, 38099975, 49933379, 135169975, 249666895, 848867443, 1248334475, 4244337215, 21221686075]

約数ペア:

[(1, 21221686075), (5, 4244337215), (17, 1248334475), (25, 848867443), (85, 249666895), (157, 135169975), (425, 49933379), (557, 38099975), (571, 37165825), (785, 27033995), (2669, 7951175), (2785, 7619995), (2855, 7433165), (3925, 5406799), (9469, 2241175), (9707, 2186225), (13345, 1590235), (13925, 1523999), (14275, 1486633), (47345, 448235), (48535, 437245), (66725, 318047), (87449, 242675), (89647, 236725)]