4000005

素因数分解:

$3^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{863}}^1$

素因数の和:977

約数の個数: 24

約数和(自身を含む): 7008768

約数和(自身を除く): 3008763

約数列:

[1, 3, 5, 9, 15, 45, 103, 309, 515, 863, 927, 1545, 2589, 4315, 4635, 7767, 12945, 38835, 88889, 266667, 444445, 800001, 1333335, 4000005]

約数ペア:

[(1, 4000005), (3, 1333335), (5, 800001), (9, 444445), (15, 266667), (45, 88889), (103, 38835), (309, 12945), (515, 7767), (863, 4635), (927, 4315), (1545, 2589)]