80771720

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{19993}}^1$

素因数の和:20105

約数の個数: 32

約数和(自身を含む): 183544920

約数和(自身を除く): 102773200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 19993, 39986, 79972, 99965, 159944, 199930, 399860, 799720, 2019293, 4038586, 8077172, 10096465, 16154344, 20192930, 40385860, 80771720]

約数ペア:

[(1, 80771720), (2, 40385860), (4, 20192930), (5, 16154344), (8, 10096465), (10, 8077172), (20, 4038586), (40, 2019293), (101, 799720), (202, 399860), (404, 199930), (505, 159944), (808, 99965), (1010, 79972), (2020, 39986), (4040, 19993)]