20416280

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3251}}^1$

素因数の和:3419

約数の個数: 32

約数和(自身を含む): 46243440

約数和(自身を除く): 25827160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3251, 6280, 6502, 13004, 16255, 26008, 32510, 65020, 130040, 510407, 1020814, 2041628, 2552035, 4083256, 5104070, 10208140, 20416280]

約数ペア:

[(1, 20416280), (2, 10208140), (4, 5104070), (5, 4083256), (8, 2552035), (10, 2041628), (20, 1020814), (40, 510407), (157, 130040), (314, 65020), (628, 32510), (785, 26008), (1256, 16255), (1570, 13004), (3140, 6502), (3251, 6280)]