20512421215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{345647}}^1$

素因数の和:345759

約数の個数: 32

約数和(自身を含む): 29266707456

約数和(自身を除く): 8754286241

約数列:

[1, 5, 11, 13, 55, 65, 83, 143, 415, 715, 913, 1079, 4565, 5395, 11869, 59345, 345647, 1728235, 3802117, 4493411, 19010585, 22467055, 28688701, 49427521, 143443505, 247137605, 315575711, 372953113, 1577878555, 1864765565, 4102484243, 20512421215]

約数ペア:

[(1, 20512421215), (5, 4102484243), (11, 1864765565), (13, 1577878555), (55, 372953113), (65, 315575711), (83, 247137605), (143, 143443505), (415, 49427521), (715, 28688701), (913, 22467055), (1079, 19010585), (4565, 4493411), (5395, 3802117), (11869, 1728235), (59345, 345647)]