19511987

素因数分解:

${\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{191}}^1\times {\mathrm{251}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 22063104

約数和(自身を除く): 2551117

約数列:

[1, 11, 37, 191, 251, 407, 2101, 2761, 7067, 9287, 47941, 77737, 102157, 527351, 1773817, 19511987]

約数ペア:

[(1, 19511987), (11, 1773817), (37, 527351), (191, 102157), (251, 77737), (407, 47941), (2101, 9287), (2761, 7067)]