20016460

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2447}}^1$

素因数の和:2865

約数の個数: 24

約数和(自身を含む): 42154560

約数和(自身を除く): 22138100

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2447, 4090, 4894, 8180, 9788, 12235, 24470, 48940, 1000823, 2001646, 4003292, 5004115, 10008230, 20016460]

約数ペア:

[(1, 20016460), (2, 10008230), (4, 5004115), (5, 4003292), (10, 2001646), (20, 1000823), (409, 48940), (818, 24470), (1636, 12235), (2045, 9788), (2447, 8180), (4090, 4894)]