21084880

素因数分解:

$2^4\times 5^1\times {\mathrm{263561}}^1$

素因数の和:263574

約数の個数: 20

約数和(自身を含む): 49022532

約数和(自身を除く): 27937652

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263561, 527122, 1054244, 1317805, 2108488, 2635610, 4216976, 5271220, 10542440, 21084880]

約数ペア:

[(1, 21084880), (2, 10542440), (4, 5271220), (5, 4216976), (8, 2635610), (10, 2108488), (16, 1317805), (20, 1054244), (40, 527122), (80, 263561)]