20478040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4231}}^1$

素因数の和:4264

約数の個数: 48

約数和(自身を含む): 50657040

約数和(自身を除く): 30179000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4231, 4840, 8462, 16924, 21155, 33848, 42310, 46541, 84620, 93082, 169240, 186164, 232705, 372328, 465410, 511951, 930820, 1023902, 1861640, 2047804, 2559755, 4095608, 5119510, 10239020, 20478040]

約数ペア:

[(1, 20478040), (2, 10239020), (4, 5119510), (5, 4095608), (8, 2559755), (10, 2047804), (11, 1861640), (20, 1023902), (22, 930820), (40, 511951), (44, 465410), (55, 372328), (88, 232705), (110, 186164), (121, 169240), (220, 93082), (242, 84620), (440, 46541), (484, 42310), (605, 33848), (968, 21155), (1210, 16924), (2420, 8462), (4231, 4840)]