21185380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{283}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 47234880

約数和(自身を除く): 26049500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 197, 283, 380, 394, 566, 788, 985, 1132, 1415, 1970, 2830, 3743, 3940, 5377, 5660, 7486, 10754, 14972, 18715, 21508, 26885, 37430, 53770, 55751, 74860, 107540, 111502, 223004, 278755, 557510, 1059269, 1115020, 2118538, 4237076, 5296345, 10592690, 21185380]

約数ペア:

[(1, 21185380), (2, 10592690), (4, 5296345), (5, 4237076), (10, 2118538), (19, 1115020), (20, 1059269), (38, 557510), (76, 278755), (95, 223004), (190, 111502), (197, 107540), (283, 74860), (380, 55751), (394, 53770), (566, 37430), (788, 26885), (985, 21508), (1132, 18715), (1415, 14972), (1970, 10754), (2830, 7486), (3743, 5660), (3940, 5377)]