21307575

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6607}}^1$

素因数の和:6663

約数の個数: 24

約数和(自身を含む): 36053248

約数和(自身を除く): 14745673

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6607, 19821, 33035, 99105, 165175, 284101, 495525, 852303, 1420505, 4261515, 7102525, 21307575]

約数ペア:

[(1, 21307575), (3, 7102525), (5, 4261515), (15, 1420505), (25, 852303), (43, 495525), (75, 284101), (129, 165175), (215, 99105), (645, 33035), (1075, 19821), (3225, 6607)]