21428900

素因数分解:

$2^2\times 5^2\times {\mathrm{421}}^1\times {\mathrm{509}}^1$

素因数の和:944

約数の個数: 36

約数和(自身を含む): 46702740

約数和(自身を除く): 25273840

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 421, 509, 842, 1018, 1684, 2036, 2105, 2545, 4210, 5090, 8420, 10180, 10525, 12725, 21050, 25450, 42100, 50900, 214289, 428578, 857156, 1071445, 2142890, 4285780, 5357225, 10714450, 21428900]

約数ペア:

[(1, 21428900), (2, 10714450), (4, 5357225), (5, 4285780), (10, 2142890), (20, 1071445), (25, 857156), (50, 428578), (100, 214289), (421, 50900), (509, 42100), (842, 25450), (1018, 21050), (1684, 12725), (2036, 10525), (2105, 10180), (2545, 8420), (4210, 5090)]