21109518

素因数分解:

$2^1\times 3^3\times {\mathrm{431}}^1\times {\mathrm{907}}^1$

素因数の和:1349

約数の個数: 32

約数和(自身を含む): 47070720

約数和(自身を除く): 25961202

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 431, 862, 907, 1293, 1814, 2586, 2721, 3879, 5442, 7758, 8163, 11637, 16326, 23274, 24489, 48978, 390917, 781834, 1172751, 2345502, 3518253, 7036506, 10554759, 21109518]

約数ペア:

[(1, 21109518), (2, 10554759), (3, 7036506), (6, 3518253), (9, 2345502), (18, 1172751), (27, 781834), (54, 390917), (431, 48978), (862, 24489), (907, 23274), (1293, 16326), (1814, 11637), (2586, 8163), (2721, 7758), (3879, 5442)]