19987396

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{421}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 41686848

約数和(自身を除く): 21699452

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 83, 143, 166, 286, 332, 421, 572, 842, 913, 1079, 1684, 1826, 2158, 3652, 4316, 4631, 5473, 9262, 10946, 11869, 18524, 21892, 23738, 34943, 47476, 60203, 69886, 120406, 139772, 240812, 384373, 454259, 768746, 908518, 1537492, 1817036, 4996849, 9993698, 19987396]

約数ペア:

[(1, 19987396), (2, 9993698), (4, 4996849), (11, 1817036), (13, 1537492), (22, 908518), (26, 768746), (44, 454259), (52, 384373), (83, 240812), (143, 139772), (166, 120406), (286, 69886), (332, 60203), (421, 47476), (572, 34943), (842, 23738), (913, 21892), (1079, 18524), (1684, 11869), (1826, 10946), (2158, 9262), (3652, 5473), (4316, 4631)]