20921577

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{59}}^1\times {\mathrm{409}}^1$

素因数の和:505

約数の個数: 24

約数和(自身を含む): 30208800

約数和(自身を除く): 9287223

約数列:

[1, 3, 17, 51, 59, 177, 289, 409, 867, 1003, 1227, 3009, 6953, 17051, 20859, 24131, 51153, 72393, 118201, 354603, 410227, 1230681, 6973859, 20921577]

約数ペア:

[(1, 20921577), (3, 6973859), (17, 1230681), (51, 410227), (59, 354603), (177, 118201), (289, 72393), (409, 51153), (867, 24131), (1003, 20859), (1227, 17051), (3009, 6953)]