19881855

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7013}}^1$

素因数の和:7037

約数の個数: 40

約数和(自身を含む): 40737312

約数和(自身を除く): 20855457

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7013, 21039, 35065, 49091, 63117, 105195, 147273, 189351, 245455, 315585, 441819, 568053, 736365, 946755, 1325457, 2209095, 2840265, 3976371, 6627285, 19881855]

約数ペア:

[(1, 19881855), (3, 6627285), (5, 3976371), (7, 2840265), (9, 2209095), (15, 1325457), (21, 946755), (27, 736365), (35, 568053), (45, 441819), (63, 315585), (81, 245455), (105, 189351), (135, 147273), (189, 105195), (315, 63117), (405, 49091), (567, 35065), (945, 21039), (2835, 7013)]