19921540

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{26921}}^1$

素因数の和:26967

約数の個数: 24

約数和(自身を含む): 42967512

約数和(自身を除く): 23045972

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 26921, 53842, 107684, 134605, 269210, 538420, 996077, 1992154, 3984308, 4980385, 9960770, 19921540]

約数ペア:

[(1, 19921540), (2, 9960770), (4, 4980385), (5, 3984308), (10, 1992154), (20, 996077), (37, 538420), (74, 269210), (148, 134605), (185, 107684), (370, 53842), (740, 26921)]