21178160

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13933}}^1$

素因数の和:13965

約数の個数: 40

約数和(自身を含む): 51834480

約数和(自身を除く): 30656320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13933, 27866, 55732, 69665, 111464, 139330, 222928, 264727, 278660, 529454, 557320, 1058908, 1114640, 1323635, 2117816, 2647270, 4235632, 5294540, 10589080, 21178160]

約数ペア:

[(1, 21178160), (2, 10589080), (4, 5294540), (5, 4235632), (8, 2647270), (10, 2117816), (16, 1323635), (19, 1114640), (20, 1058908), (38, 557320), (40, 529454), (76, 278660), (80, 264727), (95, 222928), (152, 139330), (190, 111464), (304, 69665), (380, 55732), (760, 27866), (1520, 13933)]