19867720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11551}}^1$

素因数の和:11605

約数の個数: 32

約数和(自身を含む): 45745920

約数和(自身を除く): 25878200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11551, 23102, 46204, 57755, 92408, 115510, 231020, 462040, 496693, 993386, 1986772, 2483465, 3973544, 4966930, 9933860, 19867720]

約数ペア:

[(1, 19867720), (2, 9933860), (4, 4966930), (5, 3973544), (8, 2483465), (10, 1986772), (20, 993386), (40, 496693), (43, 462040), (86, 231020), (172, 115510), (215, 92408), (344, 57755), (430, 46204), (860, 23102), (1720, 11551)]