21368680

素因数分解:

$2^3\times 5^1\times {\mathrm{719}}^1\times {\mathrm{743}}^1$

素因数の和:1473

約数の個数: 32

約数和(自身を含む): 48211200

約数和(自身を除く): 26842520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 719, 743, 1438, 1486, 2876, 2972, 3595, 3715, 5752, 5944, 7190, 7430, 14380, 14860, 28760, 29720, 534217, 1068434, 2136868, 2671085, 4273736, 5342170, 10684340, 21368680]

約数ペア:

[(1, 21368680), (2, 10684340), (4, 5342170), (5, 4273736), (8, 2671085), (10, 2136868), (20, 1068434), (40, 534217), (719, 29720), (743, 28760), (1438, 14860), (1486, 14380), (2876, 7430), (2972, 7190), (3595, 5944), (3715, 5752)]