20171720

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4993}}^1$

素因数の和:5105

約数の個数: 32

約数和(自身を含む): 45844920

約数和(自身を除く): 25673200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4993, 9986, 19972, 24965, 39944, 49930, 99860, 199720, 504293, 1008586, 2017172, 2521465, 4034344, 5042930, 10085860, 20171720]

約数ペア:

[(1, 20171720), (2, 10085860), (4, 5042930), (5, 4034344), (8, 2521465), (10, 2017172), (20, 1008586), (40, 504293), (101, 199720), (202, 99860), (404, 49930), (505, 39944), (808, 24965), (1010, 19972), (2020, 9986), (4040, 4993)]