21140168

素因数分解:

$2^3\times 7^2\times {\mathrm{199}}^1\times {\mathrm{271}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 46512000

約数和(自身を除く): 25371832

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 199, 271, 392, 398, 542, 796, 1084, 1393, 1592, 1897, 2168, 2786, 3794, 5572, 7588, 9751, 11144, 13279, 15176, 19502, 26558, 39004, 53116, 53929, 78008, 106232, 107858, 215716, 377503, 431432, 755006, 1510012, 2642521, 3020024, 5285042, 10570084, 21140168]

約数ペア:

[(1, 21140168), (2, 10570084), (4, 5285042), (7, 3020024), (8, 2642521), (14, 1510012), (28, 755006), (49, 431432), (56, 377503), (98, 215716), (196, 107858), (199, 106232), (271, 78008), (392, 53929), (398, 53116), (542, 39004), (796, 26558), (1084, 19502), (1393, 15176), (1592, 13279), (1897, 11144), (2168, 9751), (2786, 7588), (3794, 5572)]