16780840

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{947}}^1$

素因数の和:1401

約数の個数: 32

約数和(自身を含む): 37882080

約数和(自身を除く): 21101240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 947, 1772, 1894, 2215, 3544, 3788, 4430, 4735, 7576, 8860, 9470, 17720, 18940, 37880, 419521, 839042, 1678084, 2097605, 3356168, 4195210, 8390420, 16780840]

約数ペア:

[(1, 16780840), (2, 8390420), (4, 4195210), (5, 3356168), (8, 2097605), (10, 1678084), (20, 839042), (40, 419521), (443, 37880), (886, 18940), (947, 17720), (1772, 9470), (1894, 8860), (2215, 7576), (3544, 4735), (3788, 4430)]