20077421

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 26046720

約数和(自身を除く): 5969299

約数列:

[1, 7, 13, 37, 67, 89, 91, 259, 469, 481, 623, 871, 1157, 2479, 3293, 3367, 5963, 6097, 8099, 17353, 23051, 32227, 41741, 42809, 77519, 220631, 225589, 299663, 542633, 1544417, 2868203, 20077421]

約数ペア:

[(1, 20077421), (7, 2868203), (13, 1544417), (37, 542633), (67, 299663), (89, 225589), (91, 220631), (259, 77519), (469, 42809), (481, 41741), (623, 32227), (871, 23051), (1157, 17353), (2479, 8099), (3293, 6097), (3367, 5963)]