20409928

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1949}}^1$

素因数の和:1990

約数の個数: 64

約数和(自身を含む): 50544000

約数和(自身を除く): 30134072

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 22, 28, 34, 44, 56, 68, 77, 88, 119, 136, 154, 187, 238, 308, 374, 476, 616, 748, 952, 1309, 1496, 1949, 2618, 3898, 5236, 7796, 10472, 13643, 15592, 21439, 27286, 33133, 42878, 54572, 66266, 85756, 109144, 132532, 150073, 171512, 231931, 265064, 300146, 364463, 463862, 600292, 728926, 927724, 1200584, 1457852, 1855448, 2551241, 2915704, 5102482, 10204964, 20409928]

約数ペア:

[(1, 20409928), (2, 10204964), (4, 5102482), (7, 2915704), (8, 2551241), (11, 1855448), (14, 1457852), (17, 1200584), (22, 927724), (28, 728926), (34, 600292), (44, 463862), (56, 364463), (68, 300146), (77, 265064), (88, 231931), (119, 171512), (136, 150073), (154, 132532), (187, 109144), (238, 85756), (308, 66266), (374, 54572), (476, 42878), (616, 33133), (748, 27286), (952, 21439), (1309, 15592), (1496, 13643), (1949, 10472), (2618, 7796), (3898, 5236)]