21658185

素因数分解:

$3^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1009}}^1$

素因数の和:1079

約数の個数: 40

約数和(自身を含む): 39596040

約数和(自身を除く): 17937855

約数列:

[1, 3, 5, 9, 15, 27, 45, 53, 81, 135, 159, 265, 405, 477, 795, 1009, 1431, 2385, 3027, 4293, 5045, 7155, 9081, 15135, 21465, 27243, 45405, 53477, 81729, 136215, 160431, 267385, 408645, 481293, 802155, 1443879, 2406465, 4331637, 7219395, 21658185]

約数ペア:

[(1, 21658185), (3, 7219395), (5, 4331637), (9, 2406465), (15, 1443879), (27, 802155), (45, 481293), (53, 408645), (81, 267385), (135, 160431), (159, 136215), (265, 81729), (405, 53477), (477, 45405), (795, 27243), (1009, 21465), (1431, 15135), (2385, 9081), (3027, 7155), (4293, 5045)]