20413540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1049}}^1$

素因数の和:1204

約数の個数: 48

約数和(自身を含む): 49392000

約数和(自身を除く): 28978460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1049, 1390, 1946, 2098, 2780, 3892, 4196, 4865, 5245, 7343, 9730, 10490, 14686, 19460, 20980, 29372, 36715, 73430, 145811, 146860, 291622, 583244, 729055, 1020677, 1458110, 2041354, 2916220, 4082708, 5103385, 10206770, 20413540]

約数ペア:

[(1, 20413540), (2, 10206770), (4, 5103385), (5, 4082708), (7, 2916220), (10, 2041354), (14, 1458110), (20, 1020677), (28, 729055), (35, 583244), (70, 291622), (139, 146860), (140, 145811), (278, 73430), (556, 36715), (695, 29372), (973, 20980), (1049, 19460), (1390, 14686), (1946, 10490), (2098, 9730), (2780, 7343), (3892, 5245), (4196, 4865)]