21157605

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{439}}^1$

素因数の和:480

約数の個数: 80

約数和(自身を含む): 45999360

約数和(自身を除く): 24841755

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 51, 63, 81, 85, 105, 119, 135, 153, 189, 255, 315, 357, 405, 439, 459, 567, 595, 765, 945, 1071, 1317, 1377, 1785, 2195, 2295, 2835, 3073, 3213, 3951, 5355, 6585, 6885, 7463, 9219, 9639, 11853, 15365, 16065, 19755, 22389, 27657, 35559, 37315, 46095, 48195, 52241, 59265, 67167, 82971, 111945, 138285, 156723, 177795, 201501, 248913, 261205, 335835, 414855, 470169, 604503, 783615, 1007505, 1244565, 1410507, 2350845, 3022515, 4231521, 7052535, 21157605]

約数ペア:

[(1, 21157605), (3, 7052535), (5, 4231521), (7, 3022515), (9, 2350845), (15, 1410507), (17, 1244565), (21, 1007505), (27, 783615), (35, 604503), (45, 470169), (51, 414855), (63, 335835), (81, 261205), (85, 248913), (105, 201501), (119, 177795), (135, 156723), (153, 138285), (189, 111945), (255, 82971), (315, 67167), (357, 59265), (405, 52241), (439, 48195), (459, 46095), (567, 37315), (595, 35559), (765, 27657), (945, 22389), (1071, 19755), (1317, 16065), (1377, 15365), (1785, 11853), (2195, 9639), (2295, 9219), (2835, 7463), (3073, 6885), (3213, 6585), (3951, 5355)]