19707280

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1361}}^1$

素因数の和:1555

約数の個数: 40

約数和(自身を含む): 46106424

約数和(自身を除く): 26399144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1361, 1448, 1810, 2722, 2896, 3620, 5444, 6805, 7240, 10888, 13610, 14480, 21776, 27220, 54440, 108880, 246341, 492682, 985364, 1231705, 1970728, 2463410, 3941456, 4926820, 9853640, 19707280]

約数ペア:

[(1, 19707280), (2, 9853640), (4, 4926820), (5, 3941456), (8, 2463410), (10, 1970728), (16, 1231705), (20, 985364), (40, 492682), (80, 246341), (181, 108880), (362, 54440), (724, 27220), (905, 21776), (1361, 14480), (1448, 13610), (1810, 10888), (2722, 7240), (2896, 6805), (3620, 5444)]