21365940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20947}}^1$

素因数の和:20976

約数の個数: 48

約数和(自身を含む): 63346752

約数和(自身を除く): 41980812

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 20947, 41894, 62841, 83788, 104735, 125682, 209470, 251364, 314205, 356099, 418940, 628410, 712198, 1068297, 1256820, 1424396, 1780495, 2136594, 3560990, 4273188, 5341485, 7121980, 10682970, 21365940]

約数ペア:

[(1, 21365940), (2, 10682970), (3, 7121980), (4, 5341485), (5, 4273188), (6, 3560990), (10, 2136594), (12, 1780495), (15, 1424396), (17, 1256820), (20, 1068297), (30, 712198), (34, 628410), (51, 418940), (60, 356099), (68, 314205), (85, 251364), (102, 209470), (170, 125682), (204, 104735), (255, 83788), (340, 62841), (510, 41894), (1020, 20947)]