81021928

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{313}}^1$

素因数の和:482

約数の個数: 64

約数和(自身を含む): 174081600

約数和(自身を除く): 93059672

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 131, 152, 247, 262, 313, 494, 524, 626, 988, 1048, 1252, 1703, 1976, 2489, 2504, 3406, 4069, 4978, 5947, 6812, 8138, 9956, 11894, 13624, 16276, 19912, 23788, 32357, 32552, 41003, 47576, 64714, 77311, 82006, 129428, 154622, 164012, 258856, 309244, 328024, 533039, 618488, 779057, 1066078, 1558114, 2132156, 3116228, 4264312, 6232456, 10127741, 20255482, 40510964, 81021928]

約数ペア:

[(1, 81021928), (2, 40510964), (4, 20255482), (8, 10127741), (13, 6232456), (19, 4264312), (26, 3116228), (38, 2132156), (52, 1558114), (76, 1066078), (104, 779057), (131, 618488), (152, 533039), (247, 328024), (262, 309244), (313, 258856), (494, 164012), (524, 154622), (626, 129428), (988, 82006), (1048, 77311), (1252, 64714), (1703, 47576), (1976, 41003), (2489, 32552), (2504, 32357), (3406, 23788), (4069, 19912), (4978, 16276), (5947, 13624), (6812, 11894), (8138, 9956)]