90399280

素因数分解:

$2^4\times 5^1\times {\mathrm{1129991}}^1$

素因数の和:1130004

約数の個数: 20

約数和(自身を含む): 210178512

約数和(自身を除く): 119779232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1129991, 2259982, 4519964, 5649955, 9039928, 11299910, 18079856, 22599820, 45199640, 90399280]

約数ペア:

[(1, 90399280), (2, 45199640), (4, 22599820), (5, 18079856), (8, 11299910), (10, 9039928), (16, 5649955), (20, 4519964), (40, 2259982), (80, 1129991)]