20090728

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 45342720

約数和(自身を除く): 25251992

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 71, 124, 142, 163, 217, 248, 284, 326, 434, 497, 568, 652, 868, 994, 1141, 1304, 1736, 1988, 2201, 2282, 3976, 4402, 4564, 5053, 8804, 9128, 10106, 11573, 15407, 17608, 20212, 23146, 30814, 35371, 40424, 46292, 61628, 70742, 81011, 92584, 123256, 141484, 162022, 282968, 324044, 358763, 648088, 717526, 1435052, 2511341, 2870104, 5022682, 10045364, 20090728]

約数ペア:

[(1, 20090728), (2, 10045364), (4, 5022682), (7, 2870104), (8, 2511341), (14, 1435052), (28, 717526), (31, 648088), (56, 358763), (62, 324044), (71, 282968), (124, 162022), (142, 141484), (163, 123256), (217, 92584), (248, 81011), (284, 70742), (326, 61628), (434, 46292), (497, 40424), (568, 35371), (652, 30814), (868, 23146), (994, 20212), (1141, 17608), (1304, 15407), (1736, 11573), (1988, 10106), (2201, 9128), (2282, 8804), (3976, 5053), (4402, 4564)]