21000859196

素因数分解:

$2^2\times {\mathrm{409}}^1\times {\mathrm{421}}^1\times {\mathrm{30491}}^1$

素因数の和:31325

約数の個数: 24

約数和(自身を含む): 36930080880

約数和(自身を除く): 15929221684

約数列:

[1, 2, 4, 409, 421, 818, 842, 1636, 1684, 30491, 60982, 121964, 172189, 344378, 688756, 12470819, 12836711, 24941638, 25673422, 49883276, 51346844, 5250214799, 10500429598, 21000859196]

約数ペア:

[(1, 21000859196), (2, 10500429598), (4, 5250214799), (409, 51346844), (421, 49883276), (818, 25673422), (842, 24941638), (1636, 12836711), (1684, 12470819), (30491, 688756), (60982, 344378), (121964, 172189)]