21751755

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{433}}^1$

素因数の和:655

約数の個数: 32

約数和(自身を含む): 37122624

約数和(自身を除く): 15370869

約数列:

[1, 3, 5, 15, 17, 51, 85, 197, 255, 433, 591, 985, 1299, 2165, 2955, 3349, 6495, 7361, 10047, 16745, 22083, 36805, 50235, 85301, 110415, 255903, 426505, 1279515, 1450117, 4350351, 7250585, 21751755]

約数ペア:

[(1, 21751755), (3, 7250585), (5, 4350351), (15, 1450117), (17, 1279515), (51, 426505), (85, 255903), (197, 110415), (255, 85301), (433, 50235), (591, 36805), (985, 22083), (1299, 16745), (2165, 10047), (2955, 7361), (3349, 6495)]