18151720

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4493}}^1$

素因数の和:4605

約数の個数: 32

約数和(自身を含む): 41254920

約数和(自身を除く): 23103200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4493, 8986, 17972, 22465, 35944, 44930, 89860, 179720, 453793, 907586, 1815172, 2268965, 3630344, 4537930, 9075860, 18151720]

約数ペア:

[(1, 18151720), (2, 9075860), (4, 4537930), (5, 3630344), (8, 2268965), (10, 1815172), (20, 907586), (40, 453793), (101, 179720), (202, 89860), (404, 44930), (505, 35944), (808, 22465), (1010, 17972), (2020, 8986), (4040, 4493)]