21668156909

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{1087}}^1\times {\mathrm{2237}}^1$

素因数の和:3417

約数の個数: 32

約数和(自身を含む): 26492190720

約数和(自身を除く): 4824033811

約数列:

[1, 7, 19, 67, 133, 469, 1087, 1273, 2237, 7609, 8911, 15659, 20653, 42503, 72829, 144571, 149879, 297521, 509803, 1049153, 1383751, 2431619, 2847701, 9686257, 17021333, 19933907, 46200761, 162918473, 323405327, 1140429311, 3095450987, 21668156909]

約数ペア:

[(1, 21668156909), (7, 3095450987), (19, 1140429311), (67, 323405327), (133, 162918473), (469, 46200761), (1087, 19933907), (1273, 17021333), (2237, 9686257), (7609, 2847701), (8911, 2431619), (15659, 1383751), (20653, 1049153), (42503, 509803), (72829, 297521), (144571, 149879)]