21553569

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{787}}^1$

素因数の和:989

約数の個数: 24

約数和(自身を含む): 33190560

約数和(自身を除く): 11636991

約数列:

[1, 3, 9, 17, 51, 153, 179, 537, 787, 1611, 2361, 3043, 7083, 9129, 13379, 27387, 40137, 120411, 140873, 422619, 1267857, 2394841, 7184523, 21553569]

約数ペア:

[(1, 21553569), (3, 7184523), (9, 2394841), (17, 1267857), (51, 422619), (153, 140873), (179, 120411), (537, 40137), (787, 27387), (1611, 13379), (2361, 9129), (3043, 7083)]