20893880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1051}}^1$

素因数の和:1140

約数の個数: 64

約数和(自身を含む): 54535680

約数和(自身を除く): 33641800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1051, 1420, 1988, 2102, 2485, 2840, 3976, 4204, 4970, 5255, 7357, 8408, 9940, 10510, 14714, 19880, 21020, 29428, 36785, 42040, 58856, 73570, 74621, 147140, 149242, 294280, 298484, 373105, 522347, 596968, 746210, 1044694, 1492420, 2089388, 2611735, 2984840, 4178776, 5223470, 10446940, 20893880]

約数ペア:

[(1, 20893880), (2, 10446940), (4, 5223470), (5, 4178776), (7, 2984840), (8, 2611735), (10, 2089388), (14, 1492420), (20, 1044694), (28, 746210), (35, 596968), (40, 522347), (56, 373105), (70, 298484), (71, 294280), (140, 149242), (142, 147140), (280, 74621), (284, 73570), (355, 58856), (497, 42040), (568, 36785), (710, 29428), (994, 21020), (1051, 19880), (1420, 14714), (1988, 10510), (2102, 9940), (2485, 8408), (2840, 7357), (3976, 5255), (4204, 4970)]