20875505

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 30032640

約数和(自身を除く): 9157135

約数列:

[1, 5, 7, 29, 35, 131, 145, 157, 203, 655, 785, 917, 1015, 1099, 3799, 4553, 4585, 5495, 18995, 20567, 22765, 26593, 31871, 102835, 132965, 143969, 159355, 596443, 719845, 2982215, 4175101, 20875505]

約数ペア:

[(1, 20875505), (5, 4175101), (7, 2982215), (29, 719845), (35, 596443), (131, 159355), (145, 143969), (157, 132965), (203, 102835), (655, 31871), (785, 26593), (917, 22765), (1015, 20567), (1099, 18995), (3799, 5495), (4553, 4585)]