90239720

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{3413}}^1$

素因数の和:4085

約数の個数: 32

約数和(自身を含む): 203406120

約数和(自身を除く): 113166400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 1322, 2644, 3305, 3413, 5288, 6610, 6826, 13220, 13652, 17065, 26440, 27304, 34130, 68260, 136520, 2255993, 4511986, 9023972, 11279965, 18047944, 22559930, 45119860, 90239720]

約数ペア:

[(1, 90239720), (2, 45119860), (4, 22559930), (5, 18047944), (8, 11279965), (10, 9023972), (20, 4511986), (40, 2255993), (661, 136520), (1322, 68260), (2644, 34130), (3305, 27304), (3413, 26440), (5288, 17065), (6610, 13652), (6826, 13220)]