21981388

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{463}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 45835776

約数和(自身を除く): 23854388

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 83, 143, 166, 286, 332, 463, 572, 913, 926, 1079, 1826, 1852, 2158, 3652, 4316, 5093, 6019, 10186, 11869, 12038, 20372, 23738, 24076, 38429, 47476, 66209, 76858, 132418, 153716, 264836, 422719, 499577, 845438, 999154, 1690876, 1998308, 5495347, 10990694, 21981388]

約数ペア:

[(1, 21981388), (2, 10990694), (4, 5495347), (11, 1998308), (13, 1690876), (22, 999154), (26, 845438), (44, 499577), (52, 422719), (83, 264836), (143, 153716), (166, 132418), (286, 76858), (332, 66209), (463, 47476), (572, 38429), (913, 24076), (926, 23738), (1079, 20372), (1826, 12038), (1852, 11869), (2158, 10186), (3652, 6019), (4316, 5093)]