20702980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{277}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 45256176

約数和(自身を除く): 24553196

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 101, 148, 185, 202, 277, 370, 404, 505, 554, 740, 1010, 1108, 1385, 2020, 2770, 3737, 5540, 7474, 10249, 14948, 18685, 20498, 27977, 37370, 40996, 51245, 55954, 74740, 102490, 111908, 139885, 204980, 279770, 559540, 1035149, 2070298, 4140596, 5175745, 10351490, 20702980]

約数ペア:

[(1, 20702980), (2, 10351490), (4, 5175745), (5, 4140596), (10, 2070298), (20, 1035149), (37, 559540), (74, 279770), (101, 204980), (148, 139885), (185, 111908), (202, 102490), (277, 74740), (370, 55954), (404, 51245), (505, 40996), (554, 37370), (740, 27977), (1010, 20498), (1108, 18685), (1385, 14948), (2020, 10249), (2770, 7474), (3737, 5540)]