20505195

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10597}}^1$

素因数の和:10651

約数の個数: 24

約数和(自身を含む): 36372336

約数和(自身を除く): 15867141

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10597, 31791, 52985, 95373, 158955, 455671, 476865, 1367013, 2278355, 4101039, 6835065, 20505195]

約数ペア:

[(1, 20505195), (3, 6835065), (5, 4101039), (9, 2278355), (15, 1367013), (43, 476865), (45, 455671), (129, 158955), (215, 95373), (387, 52985), (645, 31791), (1935, 10597)]