28320400

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{701}}^1$

素因数の和:820

約数の個数: 60

約数和(自身を含む): 68811444

約数和(自身を除く): 40491044

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 400, 404, 505, 701, 808, 1010, 1402, 1616, 2020, 2525, 2804, 3505, 4040, 5050, 5608, 7010, 8080, 10100, 11216, 14020, 17525, 20200, 28040, 35050, 40400, 56080, 70100, 70801, 140200, 141602, 280400, 283204, 354005, 566408, 708010, 1132816, 1416020, 1770025, 2832040, 3540050, 5664080, 7080100, 14160200, 28320400]

約数ペア:

[(1, 28320400), (2, 14160200), (4, 7080100), (5, 5664080), (8, 3540050), (10, 2832040), (16, 1770025), (20, 1416020), (25, 1132816), (40, 708010), (50, 566408), (80, 354005), (100, 283204), (101, 280400), (200, 141602), (202, 140200), (400, 70801), (404, 70100), (505, 56080), (701, 40400), (808, 35050), (1010, 28040), (1402, 20200), (1616, 17525), (2020, 14020), (2525, 11216), (2804, 10100), (3505, 8080), (4040, 7010), (5050, 5608)]