19946840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11597}}^1$

素因数の和:11651

約数の個数: 32

約数和(自身を含む): 45928080

約数和(自身を除く): 25981240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11597, 23194, 46388, 57985, 92776, 115970, 231940, 463880, 498671, 997342, 1994684, 2493355, 3989368, 4986710, 9973420, 19946840]

約数ペア:

[(1, 19946840), (2, 9973420), (4, 4986710), (5, 3989368), (8, 2493355), (10, 1994684), (20, 997342), (40, 498671), (43, 463880), (86, 231940), (172, 115970), (215, 92776), (344, 57985), (430, 46388), (860, 23194), (1720, 11597)]