15779440

素因数分解:

$2^4\times 5^1\times {\mathrm{197243}}^1$

素因数の和:197256

約数の個数: 20

約数和(自身を含む): 36687384

約数和(自身を除く): 20907944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197243, 394486, 788972, 986215, 1577944, 1972430, 3155888, 3944860, 7889720, 15779440]

約数ペア:

[(1, 15779440), (2, 7889720), (4, 3944860), (5, 3155888), (8, 1972430), (10, 1577944), (16, 986215), (20, 788972), (40, 394486), (80, 197243)]