21531519

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 13063041

約数列:

[1, 3, 9, 23, 41, 43, 59, 69, 123, 129, 177, 207, 369, 387, 531, 943, 989, 1357, 1763, 2419, 2537, 2829, 2967, 4071, 5289, 7257, 7611, 8487, 8901, 12213, 15867, 21771, 22833, 40549, 55637, 58351, 104017, 121647, 166911, 175053, 312051, 364941, 500733, 525159, 936153, 2392391, 7177173, 21531519]

約数ペア:

[(1, 21531519), (3, 7177173), (9, 2392391), (23, 936153), (41, 525159), (43, 500733), (59, 364941), (69, 312051), (123, 175053), (129, 166911), (177, 121647), (207, 104017), (369, 58351), (387, 55637), (531, 40549), (943, 22833), (989, 21771), (1357, 15867), (1763, 12213), (2419, 8901), (2537, 8487), (2829, 7611), (2967, 7257), (4071, 5289)]