18481900

素因数分解:

$2^2\times 5^2\times {\mathrm{421}}^1\times {\mathrm{439}}^1$

素因数の和:874

約数の個数: 36

約数和(自身を含む): 40292560

約数和(自身を除く): 21810660

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 421, 439, 842, 878, 1684, 1756, 2105, 2195, 4210, 4390, 8420, 8780, 10525, 10975, 21050, 21950, 42100, 43900, 184819, 369638, 739276, 924095, 1848190, 3696380, 4620475, 9240950, 18481900]

約数ペア:

[(1, 18481900), (2, 9240950), (4, 4620475), (5, 3696380), (10, 1848190), (20, 924095), (25, 739276), (50, 369638), (100, 184819), (421, 43900), (439, 42100), (842, 21950), (878, 21050), (1684, 10975), (1756, 10525), (2105, 8780), (2195, 8420), (4210, 4390)]