31648840

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1993}}^1$

素因数の和:2401

約数の個数: 32

約数和(自身を含む): 71425080

約数和(自身を除く): 39776240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 1993, 3176, 3970, 3986, 7940, 7972, 9965, 15880, 15944, 19930, 39860, 79720, 791221, 1582442, 3164884, 3956105, 6329768, 7912210, 15824420, 31648840]

約数ペア:

[(1, 31648840), (2, 15824420), (4, 7912210), (5, 6329768), (8, 3956105), (10, 3164884), (20, 1582442), (40, 791221), (397, 79720), (794, 39860), (1588, 19930), (1985, 15944), (1993, 15880), (3176, 9965), (3970, 7972), (3986, 7940)]