9781480

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2521}}^1$

素因数の和:2629

約数の個数: 32

約数和(自身を含む): 22244040

約数和(自身を除く): 12462560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 2521, 3880, 5042, 10084, 12605, 20168, 25210, 50420, 100840, 244537, 489074, 978148, 1222685, 1956296, 2445370, 4890740, 9781480]

約数ペア:

[(1, 9781480), (2, 4890740), (4, 2445370), (5, 1956296), (8, 1222685), (10, 978148), (20, 489074), (40, 244537), (97, 100840), (194, 50420), (388, 25210), (485, 20168), (776, 12605), (970, 10084), (1940, 5042), (2521, 3880)]