21456776

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{313}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 47476800

約数和(自身を除く): 26020024

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 41, 44, 76, 82, 88, 152, 164, 209, 313, 328, 418, 451, 626, 779, 836, 902, 1252, 1558, 1672, 1804, 2504, 3116, 3443, 3608, 5947, 6232, 6886, 8569, 11894, 12833, 13772, 17138, 23788, 25666, 27544, 34276, 47576, 51332, 65417, 68552, 102664, 130834, 141163, 243827, 261668, 282326, 487654, 523336, 564652, 975308, 1129304, 1950616, 2682097, 5364194, 10728388, 21456776]

約数ペア:

[(1, 21456776), (2, 10728388), (4, 5364194), (8, 2682097), (11, 1950616), (19, 1129304), (22, 975308), (38, 564652), (41, 523336), (44, 487654), (76, 282326), (82, 261668), (88, 243827), (152, 141163), (164, 130834), (209, 102664), (313, 68552), (328, 65417), (418, 51332), (451, 47576), (626, 34276), (779, 27544), (836, 25666), (902, 23788), (1252, 17138), (1558, 13772), (1672, 12833), (1804, 11894), (2504, 8569), (3116, 6886), (3443, 6232), (3608, 5947)]