21660716

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{70327}}^1$

素因数の和:70349

約数の個数: 24

約数和(自身を含む): 47260416

約数和(自身を除く): 25599700

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 70327, 140654, 281308, 492289, 773597, 984578, 1547194, 1969156, 3094388, 5415179, 10830358, 21660716]

約数ペア:

[(1, 21660716), (2, 10830358), (4, 5415179), (7, 3094388), (11, 1969156), (14, 1547194), (22, 984578), (28, 773597), (44, 492289), (77, 281308), (154, 140654), (308, 70327)]