19657421

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1\times {\mathrm{401}}^1$

素因数の和:604

約数の個数: 16

約数和(自身を含む): 23155200

約数和(自身を除く): 3497779

約数列:

[1, 7, 47, 149, 329, 401, 1043, 2807, 7003, 18847, 49021, 59749, 131929, 418243, 2808203, 19657421]

約数ペア:

[(1, 19657421), (7, 2808203), (47, 418243), (149, 131929), (329, 59749), (401, 49021), (1043, 18847), (2807, 7003)]