21865341

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10068099

約数列:

[1, 3, 23, 41, 59, 69, 123, 131, 177, 393, 943, 1357, 2419, 2829, 3013, 4071, 5371, 7257, 7729, 9039, 16113, 23187, 55637, 123533, 166911, 177767, 316889, 370599, 533301, 950667, 7288447, 21865341]

約数ペア:

[(1, 21865341), (3, 7288447), (23, 950667), (41, 533301), (59, 370599), (69, 316889), (123, 177767), (131, 166911), (177, 123533), (393, 55637), (943, 23187), (1357, 16113), (2419, 9039), (2829, 7729), (3013, 7257), (4071, 5371)]