21981556

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{1297}}^1$

素因数の和:1543

約数の個数: 24

約数和(自身を含む): 40705280

約数和(自身を除く): 18723724

約数列:

[1, 2, 4, 19, 38, 76, 223, 446, 892, 1297, 2594, 4237, 5188, 8474, 16948, 24643, 49286, 98572, 289231, 578462, 1156924, 5495389, 10990778, 21981556]

約数ペア:

[(1, 21981556), (2, 10990778), (4, 5495389), (19, 1156924), (38, 578462), (76, 289231), (223, 98572), (446, 49286), (892, 24643), (1297, 16948), (2594, 8474), (4237, 5188)]