19939420

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{9871}}^1$

素因数の和:9981

約数の個数: 24

約数和(自身を含む): 42291648

約数和(自身を除く): 22352228

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 9871, 19742, 39484, 49355, 98710, 197420, 996971, 1993942, 3987884, 4984855, 9969710, 19939420]

約数ペア:

[(1, 19939420), (2, 9969710), (4, 4984855), (5, 3987884), (10, 1993942), (20, 996971), (101, 197420), (202, 98710), (404, 49355), (505, 39484), (1010, 19742), (2020, 9871)]