20990892

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{563}}^1$

素因数の和:822

約数の個数: 48

約数和(自身を含む): 53061120

約数和(自身を除く): 32070228

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 239, 478, 563, 717, 956, 1126, 1434, 1689, 2252, 2868, 3107, 3378, 6214, 6756, 7319, 9321, 12428, 14638, 18642, 21957, 29276, 37284, 43914, 87828, 134557, 269114, 403671, 538228, 807342, 1614684, 1749241, 3498482, 5247723, 6996964, 10495446, 20990892]

約数ペア:

[(1, 20990892), (2, 10495446), (3, 6996964), (4, 5247723), (6, 3498482), (12, 1749241), (13, 1614684), (26, 807342), (39, 538228), (52, 403671), (78, 269114), (156, 134557), (239, 87828), (478, 43914), (563, 37284), (717, 29276), (956, 21957), (1126, 18642), (1434, 14638), (1689, 12428), (2252, 9321), (2868, 7319), (3107, 6756), (3378, 6214)]