20979400

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{8069}}^1$

素因数の和:8098

約数の個数: 48

約数和(自身を含む): 52535700

約数和(自身を除く): 31556300

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 8069, 16138, 32276, 40345, 64552, 80690, 104897, 161380, 201725, 209794, 322760, 403450, 419588, 524485, 806900, 839176, 1048970, 1613800, 2097940, 2622425, 4195880, 5244850, 10489700, 20979400]

約数ペア:

[(1, 20979400), (2, 10489700), (4, 5244850), (5, 4195880), (8, 2622425), (10, 2097940), (13, 1613800), (20, 1048970), (25, 839176), (26, 806900), (40, 524485), (50, 419588), (52, 403450), (65, 322760), (100, 209794), (104, 201725), (130, 161380), (200, 104897), (260, 80690), (325, 64552), (520, 40345), (650, 32276), (1300, 16138), (2600, 8069)]