21091995

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{2741}}^1$

素因数の和:2777

約数の個数: 40

約数和(自身を含む): 39813840

約数和(自身を除く): 18721845

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 81, 95, 135, 171, 285, 405, 513, 855, 1539, 2565, 2741, 7695, 8223, 13705, 24669, 41115, 52079, 74007, 123345, 156237, 222021, 260395, 370035, 468711, 781185, 1110105, 1406133, 2343555, 4218399, 7030665, 21091995]

約数ペア:

[(1, 21091995), (3, 7030665), (5, 4218399), (9, 2343555), (15, 1406133), (19, 1110105), (27, 781185), (45, 468711), (57, 370035), (81, 260395), (95, 222021), (135, 156237), (171, 123345), (285, 74007), (405, 52079), (513, 41115), (855, 24669), (1539, 13705), (2565, 8223), (2741, 7695)]