20439980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1753}}^1$

素因数の和:1826

約数の個数: 48

約数和(自身を含む): 47736864

約数和(自身を除く): 27296884

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 53, 55, 106, 110, 212, 220, 265, 530, 583, 1060, 1166, 1753, 2332, 2915, 3506, 5830, 7012, 8765, 11660, 17530, 19283, 35060, 38566, 77132, 92909, 96415, 185818, 192830, 371636, 385660, 464545, 929090, 1021999, 1858180, 2043998, 4087996, 5109995, 10219990, 20439980]

約数ペア:

[(1, 20439980), (2, 10219990), (4, 5109995), (5, 4087996), (10, 2043998), (11, 1858180), (20, 1021999), (22, 929090), (44, 464545), (53, 385660), (55, 371636), (106, 192830), (110, 185818), (212, 96415), (220, 92909), (265, 77132), (530, 38566), (583, 35060), (1060, 19283), (1166, 17530), (1753, 11660), (2332, 8765), (2915, 7012), (3506, 5830)]