31026640

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{997}}^1$

素因数の和:1399

約数の個数: 40

約数和(自身を含む): 72394920

約数和(自身を除く): 41368280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 778, 997, 1556, 1945, 1994, 3112, 3890, 3988, 4985, 6224, 7780, 7976, 9970, 15560, 15952, 19940, 31120, 39880, 79760, 387833, 775666, 1551332, 1939165, 3102664, 3878330, 6205328, 7756660, 15513320, 31026640]

約数ペア:

[(1, 31026640), (2, 15513320), (4, 7756660), (5, 6205328), (8, 3878330), (10, 3102664), (16, 1939165), (20, 1551332), (40, 775666), (80, 387833), (389, 79760), (778, 39880), (997, 31120), (1556, 19940), (1945, 15952), (1994, 15560), (3112, 9970), (3890, 7976), (3988, 7780), (4985, 6224)]