19983820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1223}}^1$

素因数の和:1294

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 25255220

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1223, 1634, 2446, 3268, 4085, 4892, 6115, 8170, 12230, 16340, 23237, 24460, 46474, 52589, 92948, 105178, 116185, 210356, 232370, 262945, 464740, 525890, 999191, 1051780, 1998382, 3996764, 4995955, 9991910, 19983820]

約数ペア:

[(1, 19983820), (2, 9991910), (4, 4995955), (5, 3996764), (10, 1998382), (19, 1051780), (20, 999191), (38, 525890), (43, 464740), (76, 262945), (86, 232370), (95, 210356), (172, 116185), (190, 105178), (215, 92948), (380, 52589), (430, 46474), (817, 24460), (860, 23237), (1223, 16340), (1634, 12230), (2446, 8170), (3268, 6115), (4085, 4892)]