18915440

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3529}}^1$

素因数の和:3609

約数の個数: 40

約数和(自身を含む): 44647440

約数和(自身を除く): 25732000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3529, 5360, 7058, 14116, 17645, 28232, 35290, 56464, 70580, 141160, 236443, 282320, 472886, 945772, 1182215, 1891544, 2364430, 3783088, 4728860, 9457720, 18915440]

約数ペア:

[(1, 18915440), (2, 9457720), (4, 4728860), (5, 3783088), (8, 2364430), (10, 1891544), (16, 1182215), (20, 945772), (40, 472886), (67, 282320), (80, 236443), (134, 141160), (268, 70580), (335, 56464), (536, 35290), (670, 28232), (1072, 17645), (1340, 14116), (2680, 7058), (3529, 5360)]