20745140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1093}}^1$

素因数の和:1188

約数の個数: 48

約数和(自身を含む): 47602128

約数和(自身を除く): 26856988

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1093, 1460, 1898, 2186, 3796, 4372, 4745, 5465, 9490, 10930, 14209, 18980, 21860, 28418, 56836, 71045, 79789, 142090, 159578, 284180, 319156, 398945, 797890, 1037257, 1595780, 2074514, 4149028, 5186285, 10372570, 20745140]

約数ペア:

[(1, 20745140), (2, 10372570), (4, 5186285), (5, 4149028), (10, 2074514), (13, 1595780), (20, 1037257), (26, 797890), (52, 398945), (65, 319156), (73, 284180), (130, 159578), (146, 142090), (260, 79789), (292, 71045), (365, 56836), (730, 28418), (949, 21860), (1093, 18980), (1460, 14209), (1898, 10930), (2186, 9490), (3796, 5465), (4372, 4745)]