20663864

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{431}}^1\times {\mathrm{461}}^1$

素因数の和:911

約数の個数: 32

約数和(自身を含む): 41912640

約数和(自身を除く): 21248776

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 431, 461, 862, 922, 1724, 1844, 3448, 3688, 5603, 5993, 11206, 11986, 22412, 23972, 44824, 47944, 198691, 397382, 794764, 1589528, 2582983, 5165966, 10331932, 20663864]

約数ペア:

[(1, 20663864), (2, 10331932), (4, 5165966), (8, 2582983), (13, 1589528), (26, 794764), (52, 397382), (104, 198691), (431, 47944), (461, 44824), (862, 23972), (922, 22412), (1724, 11986), (1844, 11206), (3448, 5993), (3688, 5603)]