20544280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12527}}^1$

素因数の和:12579

約数の個数: 32

約数和(自身を含む): 47355840

約数和(自身を除く): 26811560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12527, 25054, 50108, 62635, 100216, 125270, 250540, 501080, 513607, 1027214, 2054428, 2568035, 4108856, 5136070, 10272140, 20544280]

約数ペア:

[(1, 20544280), (2, 10272140), (4, 5136070), (5, 4108856), (8, 2568035), (10, 2054428), (20, 1027214), (40, 513607), (41, 501080), (82, 250540), (164, 125270), (205, 100216), (328, 62635), (410, 50108), (820, 25054), (1640, 12527)]