17980420

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1831}}^1$

素因数の和:2331

約数の個数: 24

約数和(自身を含む): 37856448

約数和(自身を除く): 19876028

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1831, 1964, 2455, 3662, 4910, 7324, 9155, 9820, 18310, 36620, 899021, 1798042, 3596084, 4495105, 8990210, 17980420]

約数ペア:

[(1, 17980420), (2, 8990210), (4, 4495105), (5, 3596084), (10, 1798042), (20, 899021), (491, 36620), (982, 18310), (1831, 9820), (1964, 9155), (2455, 7324), (3662, 4910)]