19812320

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11257}}^1$

素因数の和:11283

約数の個数: 48

約数和(自身を含む): 51066288

約数和(自身を除く): 31253968

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11257, 22514, 45028, 56285, 90056, 112570, 123827, 180112, 225140, 247654, 360224, 450280, 495308, 619135, 900560, 990616, 1238270, 1801120, 1981232, 2476540, 3962464, 4953080, 9906160, 19812320]

約数ペア:

[(1, 19812320), (2, 9906160), (4, 4953080), (5, 3962464), (8, 2476540), (10, 1981232), (11, 1801120), (16, 1238270), (20, 990616), (22, 900560), (32, 619135), (40, 495308), (44, 450280), (55, 360224), (80, 247654), (88, 225140), (110, 180112), (160, 123827), (176, 112570), (220, 90056), (352, 56285), (440, 45028), (880, 22514), (1760, 11257)]