20981178

素因数分解:

$2^1\times 3^2\times {\mathrm{223}}^1\times {\mathrm{5227}}^1$

素因数の和:5458

約数の個数: 24

約数和(自身を含む): 45671808

約数和(自身を除く): 24690630

約数列:

[1, 2, 3, 6, 9, 18, 223, 446, 669, 1338, 2007, 4014, 5227, 10454, 15681, 31362, 47043, 94086, 1165621, 2331242, 3496863, 6993726, 10490589, 20981178]

約数ペア:

[(1, 20981178), (2, 10490589), (3, 6993726), (6, 3496863), (9, 2331242), (18, 1165621), (223, 94086), (446, 47043), (669, 31362), (1338, 15681), (2007, 10454), (4014, 5227)]