20823885

素因数分解:

$3^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:249

約数の個数: 56

約数和(自身を含む): 38954520

約数和(自身を除く): 18130635

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 135, 145, 197, 243, 261, 405, 435, 591, 729, 783, 985, 1215, 1305, 1773, 2349, 2955, 3645, 3915, 5319, 5713, 7047, 8865, 11745, 15957, 17139, 21141, 26595, 28565, 35235, 47871, 51417, 79785, 85695, 105705, 143613, 154251, 239355, 257085, 462753, 718065, 771255, 1388259, 2313765, 4164777, 6941295, 20823885]

約数ペア:

[(1, 20823885), (3, 6941295), (5, 4164777), (9, 2313765), (15, 1388259), (27, 771255), (29, 718065), (45, 462753), (81, 257085), (87, 239355), (135, 154251), (145, 143613), (197, 105705), (243, 85695), (261, 79785), (405, 51417), (435, 47871), (591, 35235), (729, 28565), (783, 26595), (985, 21141), (1215, 17139), (1305, 15957), (1773, 11745), (2349, 8865), (2955, 7047), (3645, 5713), (3915, 5319)]