21000605380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{516493}}^1$

素因数の和:516628

約数の個数: 48

約数和(自身を含む): 46856335680

約数和(自身を除く): 25855730300

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 107, 190, 214, 380, 428, 535, 1070, 2033, 2140, 4066, 8132, 10165, 20330, 40660, 516493, 1032986, 2065972, 2582465, 5164930, 9813367, 10329860, 19626734, 39253468, 49066835, 55264751, 98133670, 110529502, 196267340, 221059004, 276323755, 552647510, 1050030269, 1105295020, 2100060538, 4200121076, 5250151345, 10500302690, 21000605380]

約数ペア:

[(1, 21000605380), (2, 10500302690), (4, 5250151345), (5, 4200121076), (10, 2100060538), (19, 1105295020), (20, 1050030269), (38, 552647510), (76, 276323755), (95, 221059004), (107, 196267340), (190, 110529502), (214, 98133670), (380, 55264751), (428, 49066835), (535, 39253468), (1070, 19626734), (2033, 10329860), (2140, 9813367), (4066, 5164930), (8132, 2582465), (10165, 2065972), (20330, 1032986), (40660, 516493)]