20090120

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1193}}^1$

素因数の和:1625

約数の個数: 32

約数和(自身を含む): 45348120

約数和(自身を除く): 25258000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1193, 1684, 2105, 2386, 3368, 4210, 4772, 5965, 8420, 9544, 11930, 16840, 23860, 47720, 502253, 1004506, 2009012, 2511265, 4018024, 5022530, 10045060, 20090120]

約数ペア:

[(1, 20090120), (2, 10045060), (4, 5022530), (5, 4018024), (8, 2511265), (10, 2009012), (20, 1004506), (40, 502253), (421, 47720), (842, 23860), (1193, 16840), (1684, 11930), (2105, 9544), (2386, 8420), (3368, 5965), (4210, 4772)]