31664720

素因数分解:

$2^4\times 5^1\times {\mathrm{397}}^1\times {\mathrm{997}}^1$

素因数の和:1407

約数の個数: 40

約数和(自身を含む): 73879944

約数和(自身を除く): 42215224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 397, 794, 997, 1588, 1985, 1994, 3176, 3970, 3988, 4985, 6352, 7940, 7976, 9970, 15880, 15952, 19940, 31760, 39880, 79760, 395809, 791618, 1583236, 1979045, 3166472, 3958090, 6332944, 7916180, 15832360, 31664720]

約数ペア:

[(1, 31664720), (2, 15832360), (4, 7916180), (5, 6332944), (8, 3958090), (10, 3166472), (16, 1979045), (20, 1583236), (40, 791618), (80, 395809), (397, 79760), (794, 39880), (997, 31760), (1588, 19940), (1985, 15952), (1994, 15880), (3176, 9970), (3970, 7976), (3988, 7940), (4985, 6352)]