20789780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1783}}^1$

素因数の和:1856

約数の個数: 48

約数和(自身を含む): 48553344

約数和(自身を除く): 27763564

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 53, 55, 106, 110, 212, 220, 265, 530, 583, 1060, 1166, 1783, 2332, 2915, 3566, 5830, 7132, 8915, 11660, 17830, 19613, 35660, 39226, 78452, 94499, 98065, 188998, 196130, 377996, 392260, 472495, 944990, 1039489, 1889980, 2078978, 4157956, 5197445, 10394890, 20789780]

約数ペア:

[(1, 20789780), (2, 10394890), (4, 5197445), (5, 4157956), (10, 2078978), (11, 1889980), (20, 1039489), (22, 944990), (44, 472495), (53, 392260), (55, 377996), (106, 196130), (110, 188998), (212, 98065), (220, 94499), (265, 78452), (530, 39226), (583, 35660), (1060, 19613), (1166, 17830), (1783, 11660), (2332, 8915), (2915, 7132), (3566, 5830)]