19917177

素因数分解:

$3^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{863}}^1$

素因数の和:1037

約数の個数: 24

約数和(自身を含む): 31124736

約数和(自身を除く): 11207559

約数列:

[1, 3, 7, 21, 49, 147, 157, 471, 863, 1099, 2589, 3297, 6041, 7693, 18123, 23079, 42287, 126861, 135491, 406473, 948437, 2845311, 6639059, 19917177]

約数ペア:

[(1, 19917177), (3, 6639059), (7, 2845311), (21, 948437), (49, 406473), (147, 135491), (157, 126861), (471, 42287), (863, 23079), (1099, 18123), (2589, 7693), (3297, 6041)]