20987560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47699}}^1$

素因数の和:47721

約数の個数: 32

約数和(自身を含む): 51516000

約数和(自身を除く): 30528440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47699, 95398, 190796, 238495, 381592, 476990, 524689, 953980, 1049378, 1907960, 2098756, 2623445, 4197512, 5246890, 10493780, 20987560]

約数ペア:

[(1, 20987560), (2, 10493780), (4, 5246890), (5, 4197512), (8, 2623445), (10, 2098756), (11, 1907960), (20, 1049378), (22, 953980), (40, 524689), (44, 476990), (55, 381592), (88, 238495), (110, 190796), (220, 95398), (440, 47699)]