21685456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{761}}^1$

素因数の和:919

約数の個数: 40

約数和(自身を含む): 45637704

約数和(自身を除く): 23952248

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 137, 208, 274, 548, 761, 1096, 1522, 1781, 2192, 3044, 3562, 6088, 7124, 9893, 12176, 14248, 19786, 28496, 39572, 79144, 104257, 158288, 208514, 417028, 834056, 1355341, 1668112, 2710682, 5421364, 10842728, 21685456]

約数ペア:

[(1, 21685456), (2, 10842728), (4, 5421364), (8, 2710682), (13, 1668112), (16, 1355341), (26, 834056), (52, 417028), (104, 208514), (137, 158288), (208, 104257), (274, 79144), (548, 39572), (761, 28496), (1096, 19786), (1522, 14248), (1781, 12176), (2192, 9893), (3044, 7124), (3562, 6088)]