28567220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1459}}^1$

素因数の和:1568

約数の個数: 48

約数和(自身を含む): 66225600

約数和(自身を除く): 37658380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1459, 1780, 1958, 2918, 3916, 4895, 5836, 7295, 9790, 14590, 16049, 19580, 29180, 32098, 64196, 80245, 129851, 160490, 259702, 320980, 519404, 649255, 1298510, 1428361, 2597020, 2856722, 5713444, 7141805, 14283610, 28567220]

約数ペア:

[(1, 28567220), (2, 14283610), (4, 7141805), (5, 5713444), (10, 2856722), (11, 2597020), (20, 1428361), (22, 1298510), (44, 649255), (55, 519404), (89, 320980), (110, 259702), (178, 160490), (220, 129851), (356, 80245), (445, 64196), (890, 32098), (979, 29180), (1459, 19580), (1780, 16049), (1958, 14590), (2918, 9790), (3916, 7295), (4895, 5836)]