20362780

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2539}}^1$

素因数の和:2949

約数の個数: 24

約数和(自身を含む): 42885360

約数和(自身を除く): 22522580

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2539, 4010, 5078, 8020, 10156, 12695, 25390, 50780, 1018139, 2036278, 4072556, 5090695, 10181390, 20362780]

約数ペア:

[(1, 20362780), (2, 10181390), (4, 5090695), (5, 4072556), (10, 2036278), (20, 1018139), (401, 50780), (802, 25390), (1604, 12695), (2005, 10156), (2539, 8020), (4010, 5078)]