21283075

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{401}}^1$

素因数の和:615

約数の個数: 24

約数和(自身を含む): 29011536

約数和(自身を除く): 7728461

約数列:

[1, 5, 11, 25, 55, 193, 275, 401, 965, 2005, 2123, 4411, 4825, 10025, 10615, 22055, 53075, 77393, 110275, 386965, 851323, 1934825, 4256615, 21283075]

約数ペア:

[(1, 21283075), (5, 4256615), (11, 1934825), (25, 851323), (55, 386965), (193, 110275), (275, 77393), (401, 53075), (965, 22055), (2005, 10615), (2123, 10025), (4411, 4825)]