20768920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^2\times {\mathrm{103}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 47857680

約数和(自身を除く): 27088760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 103, 142, 206, 284, 355, 412, 515, 568, 710, 824, 1030, 1420, 2060, 2840, 4120, 5041, 7313, 10082, 14626, 20164, 25205, 29252, 36565, 40328, 50410, 58504, 73130, 100820, 146260, 201640, 292520, 519223, 1038446, 2076892, 2596115, 4153784, 5192230, 10384460, 20768920]

約数ペア:

[(1, 20768920), (2, 10384460), (4, 5192230), (5, 4153784), (8, 2596115), (10, 2076892), (20, 1038446), (40, 519223), (71, 292520), (103, 201640), (142, 146260), (206, 100820), (284, 73130), (355, 58504), (412, 50410), (515, 40328), (568, 36565), (710, 29252), (824, 25205), (1030, 20164), (1420, 14626), (2060, 10082), (2840, 7313), (4120, 5041)]