19936215

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{643}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 37975392

約数和(自身を除く): 18039177

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 53, 65, 117, 159, 195, 265, 477, 585, 643, 689, 795, 1929, 2067, 2385, 3215, 3445, 5787, 6201, 8359, 9645, 10335, 25077, 28935, 31005, 34079, 41795, 75231, 102237, 125385, 170395, 306711, 376155, 443027, 511185, 1329081, 1533555, 2215135, 3987243, 6645405, 19936215]

約数ペア:

[(1, 19936215), (3, 6645405), (5, 3987243), (9, 2215135), (13, 1533555), (15, 1329081), (39, 511185), (45, 443027), (53, 376155), (65, 306711), (117, 170395), (159, 125385), (195, 102237), (265, 75231), (477, 41795), (585, 34079), (643, 31005), (689, 28935), (795, 25077), (1929, 10335), (2067, 9645), (2385, 8359), (3215, 6201), (3445, 5787)]