21518379

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{5209}}^1$

素因数の和:5241

約数の個数: 24

約数和(自身を含む): 34135920

約数和(自身を除く): 12617541

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 243, 459, 1377, 4131, 5209, 15627, 46881, 88553, 140643, 265659, 421929, 796977, 1265787, 2390931, 7172793, 21518379]

約数ペア:

[(1, 21518379), (3, 7172793), (9, 2390931), (17, 1265787), (27, 796977), (51, 421929), (81, 265659), (153, 140643), (243, 88553), (459, 46881), (1377, 15627), (4131, 5209)]