20999128

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{1163}}^1$

素因数の和:1267

約数の個数: 32

約数和(自身を含む): 41135760

約数和(自身を除く): 20136632

約数列:

[1, 2, 4, 8, 37, 61, 74, 122, 148, 244, 296, 488, 1163, 2257, 2326, 4514, 4652, 9028, 9304, 18056, 43031, 70943, 86062, 141886, 172124, 283772, 344248, 567544, 2624891, 5249782, 10499564, 20999128]

約数ペア:

[(1, 20999128), (2, 10499564), (4, 5249782), (8, 2624891), (37, 567544), (61, 344248), (74, 283772), (122, 172124), (148, 141886), (244, 86062), (296, 70943), (488, 43031), (1163, 18056), (2257, 9304), (2326, 9028), (4514, 4652)]