20511890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{1021}}^1$

素因数の和:1083

約数の個数: 48

約数和(自身を含む): 44040024

約数和(自身を除く): 23528134

約数列:

[1, 2, 5, 7, 10, 14, 35, 41, 49, 70, 82, 98, 205, 245, 287, 410, 490, 574, 1021, 1435, 2009, 2042, 2870, 4018, 5105, 7147, 10045, 10210, 14294, 20090, 35735, 41861, 50029, 71470, 83722, 100058, 209305, 250145, 293027, 418610, 500290, 586054, 1465135, 2051189, 2930270, 4102378, 10255945, 20511890]

約数ペア:

[(1, 20511890), (2, 10255945), (5, 4102378), (7, 2930270), (10, 2051189), (14, 1465135), (35, 586054), (41, 500290), (49, 418610), (70, 293027), (82, 250145), (98, 209305), (205, 100058), (245, 83722), (287, 71470), (410, 50029), (490, 41861), (574, 35735), (1021, 20090), (1435, 14294), (2009, 10210), (2042, 10045), (2870, 7147), (4018, 5105)]