21285928

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1069}}^1$

素因数の和:1225

約数の個数: 32

約数和(自身を含む): 42372000

約数和(自身を除く): 21086072

約数列:

[1, 2, 4, 8, 19, 38, 76, 131, 152, 262, 524, 1048, 1069, 2138, 2489, 4276, 4978, 8552, 9956, 19912, 20311, 40622, 81244, 140039, 162488, 280078, 560156, 1120312, 2660741, 5321482, 10642964, 21285928]

約数ペア:

[(1, 21285928), (2, 10642964), (4, 5321482), (8, 2660741), (19, 1120312), (38, 560156), (76, 280078), (131, 162488), (152, 140039), (262, 81244), (524, 40622), (1048, 20311), (1069, 19912), (2138, 9956), (2489, 8552), (4276, 4978)]