20556660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{863}}^1$

素因数の和:1272

約数の個数: 48

約数和(自身を含む): 57770496

約数和(自身を除く): 37213836

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 397, 794, 863, 1191, 1588, 1726, 1985, 2382, 2589, 3452, 3970, 4315, 4764, 5178, 5955, 7940, 8630, 10356, 11910, 12945, 17260, 23820, 25890, 51780, 342611, 685222, 1027833, 1370444, 1713055, 2055666, 3426110, 4111332, 5139165, 6852220, 10278330, 20556660]

約数ペア:

[(1, 20556660), (2, 10278330), (3, 6852220), (4, 5139165), (5, 4111332), (6, 3426110), (10, 2055666), (12, 1713055), (15, 1370444), (20, 1027833), (30, 685222), (60, 342611), (397, 51780), (794, 25890), (863, 23820), (1191, 17260), (1588, 12945), (1726, 11910), (1985, 10356), (2382, 8630), (2589, 7940), (3452, 5955), (3970, 5178), (4315, 4764)]