21372065

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 30627072

約数和(自身を除く): 9255007

約数列:

[1, 5, 11, 13, 55, 65, 71, 143, 355, 421, 715, 781, 923, 2105, 3905, 4615, 4631, 5473, 10153, 23155, 27365, 29891, 50765, 60203, 149455, 301015, 328801, 388583, 1644005, 1942915, 4274413, 21372065]

約数ペア:

[(1, 21372065), (5, 4274413), (11, 1942915), (13, 1644005), (55, 388583), (65, 328801), (71, 301015), (143, 149455), (355, 60203), (421, 50765), (715, 29891), (781, 27365), (923, 23155), (2105, 10153), (3905, 5473), (4615, 4631)]