19959903

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1$

素因数の和:571

約数の個数: 24

約数和(自身を含む): 29702400

約数和(自身を除く): 9742497

約数列:

[1, 3, 9, 67, 79, 201, 237, 419, 603, 711, 1257, 3771, 5293, 15879, 28073, 33101, 47637, 84219, 99303, 252657, 297909, 2217767, 6653301, 19959903]

約数ペア:

[(1, 19959903), (3, 6653301), (9, 2217767), (67, 297909), (79, 252657), (201, 99303), (237, 84219), (419, 47637), (603, 33101), (711, 28073), (1257, 15879), (3771, 5293)]