21081105

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1621}}^1$

素因数の和:1666

約数の個数: 36

約数和(自身を含む): 38840412

約数和(自身を除く): 17759307

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 289, 765, 867, 1445, 1621, 2601, 4335, 4863, 8105, 13005, 14589, 24315, 27557, 72945, 82671, 137785, 248013, 413355, 468469, 1240065, 1405407, 2342345, 4216221, 7027035, 21081105]

約数ペア:

[(1, 21081105), (3, 7027035), (5, 4216221), (9, 2342345), (15, 1405407), (17, 1240065), (45, 468469), (51, 413355), (85, 248013), (153, 137785), (255, 82671), (289, 72945), (765, 27557), (867, 24315), (1445, 14589), (1621, 13005), (2601, 8105), (4335, 4863)]