20716353

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^2$

素因数の和:111

約数の個数: 72

約数和(自身を含む): 39132288

約数和(自身を除く): 18415935

約数列:

[1, 3, 7, 9, 17, 21, 23, 29, 51, 63, 69, 87, 119, 153, 161, 203, 207, 261, 357, 391, 483, 493, 609, 667, 841, 1071, 1173, 1449, 1479, 1827, 2001, 2523, 2737, 3451, 3519, 4437, 4669, 5887, 6003, 7569, 8211, 10353, 11339, 14007, 14297, 17661, 19343, 24633, 31059, 34017, 42021, 42891, 52983, 58029, 79373, 100079, 102051, 128673, 135401, 174087, 238119, 300237, 328831, 406203, 714357, 900711, 986493, 1218609, 2301817, 2959479, 6905451, 20716353]

約数ペア:

[(1, 20716353), (3, 6905451), (7, 2959479), (9, 2301817), (17, 1218609), (21, 986493), (23, 900711), (29, 714357), (51, 406203), (63, 328831), (69, 300237), (87, 238119), (119, 174087), (153, 135401), (161, 128673), (203, 102051), (207, 100079), (261, 79373), (357, 58029), (391, 52983), (483, 42891), (493, 42021), (609, 34017), (667, 31059), (841, 24633), (1071, 19343), (1173, 17661), (1449, 14297), (1479, 14007), (1827, 11339), (2001, 10353), (2523, 8211), (2737, 7569), (3451, 6003), (3519, 5887), (4437, 4669)]