21189909

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{9209}}^1$

素因数の和:9284

約数の個数: 16

約数和(自身を含む): 30945600

約数和(自身を除く): 9755691

約数列:

[1, 3, 13, 39, 59, 177, 767, 2301, 9209, 27627, 119717, 359151, 543331, 1629993, 7063303, 21189909]

約数ペア:

[(1, 21189909), (3, 7063303), (13, 1629993), (39, 543331), (59, 359151), (177, 119717), (767, 27627), (2301, 9209)]