81338520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1301}}^1$

素因数の和:1836

約数の個数: 64

約数和(自身を含む): 244671840

約数和(自身を除く): 163333320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 521, 1042, 1301, 1563, 2084, 2602, 2605, 3126, 3903, 4168, 5204, 5210, 6252, 6505, 7806, 7815, 10408, 10420, 12504, 13010, 15612, 15630, 19515, 20840, 26020, 31224, 31260, 39030, 52040, 62520, 78060, 156120, 677821, 1355642, 2033463, 2711284, 3389105, 4066926, 5422568, 6778210, 8133852, 10167315, 13556420, 16267704, 20334630, 27112840, 40669260, 81338520]

約数ペア:

[(1, 81338520), (2, 40669260), (3, 27112840), (4, 20334630), (5, 16267704), (6, 13556420), (8, 10167315), (10, 8133852), (12, 6778210), (15, 5422568), (20, 4066926), (24, 3389105), (30, 2711284), (40, 2033463), (60, 1355642), (120, 677821), (521, 156120), (1042, 78060), (1301, 62520), (1563, 52040), (2084, 39030), (2602, 31260), (2605, 31224), (3126, 26020), (3903, 20840), (4168, 19515), (5204, 15630), (5210, 15612), (6252, 13010), (6505, 12504), (7806, 10420), (7815, 10408)]