21718647

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{439}}^1$

素因数の和:707

約数の個数: 24

約数和(自身を含む): 32947200

約数和(自身を除く): 11228553

約数列:

[1, 3, 9, 23, 69, 207, 239, 439, 717, 1317, 2151, 3951, 5497, 10097, 16491, 30291, 49473, 90873, 104921, 314763, 944289, 2413183, 7239549, 21718647]

約数ペア:

[(1, 21718647), (3, 7239549), (9, 2413183), (23, 944289), (69, 314763), (207, 104921), (239, 90873), (439, 49473), (717, 30291), (1317, 16491), (2151, 10097), (3951, 5497)]