31920040

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{7901}}^1$

素因数の和:8013

約数の個数: 32

約数和(自身を含む): 72540360

約数和(自身を除く): 40620320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 7901, 15802, 31604, 39505, 63208, 79010, 158020, 316040, 798001, 1596002, 3192004, 3990005, 6384008, 7980010, 15960020, 31920040]

約数ペア:

[(1, 31920040), (2, 15960020), (4, 7980010), (5, 6384008), (8, 3990005), (10, 3192004), (20, 1596002), (40, 798001), (101, 316040), (202, 158020), (404, 79010), (505, 63208), (808, 39505), (1010, 31604), (2020, 15802), (4040, 7901)]