31967720

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1993}}^1$

素因数の和:2405

約数の個数: 32

約数和(自身を含む): 72142920

約数和(自身を除く): 40175200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 1993, 2005, 3208, 3986, 4010, 7972, 8020, 9965, 15944, 16040, 19930, 39860, 79720, 799193, 1598386, 3196772, 3995965, 6393544, 7991930, 15983860, 31967720]

約数ペア:

[(1, 31967720), (2, 15983860), (4, 7991930), (5, 6393544), (8, 3995965), (10, 3196772), (20, 1598386), (40, 799193), (401, 79720), (802, 39860), (1604, 19930), (1993, 16040), (2005, 15944), (3208, 9965), (3986, 8020), (4010, 7972)]