81780820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{1481}}^1$

素因数の和:1752

約数の個数: 48

約数和(自身を含む): 188225856

約数和(自身を除く): 106445036

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 251, 502, 1004, 1255, 1481, 2510, 2761, 2962, 5020, 5522, 5924, 7405, 11044, 13805, 14810, 16291, 27610, 29620, 32582, 55220, 65164, 81455, 162910, 325820, 371731, 743462, 1486924, 1858655, 3717310, 4089041, 7434620, 8178082, 16356164, 20445205, 40890410, 81780820]

約数ペア:

[(1, 81780820), (2, 40890410), (4, 20445205), (5, 16356164), (10, 8178082), (11, 7434620), (20, 4089041), (22, 3717310), (44, 1858655), (55, 1486924), (110, 743462), (220, 371731), (251, 325820), (502, 162910), (1004, 81455), (1255, 65164), (1481, 55220), (2510, 32582), (2761, 29620), (2962, 27610), (5020, 16291), (5522, 14810), (5924, 13805), (7405, 11044)]