20538720

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{839}}^1$

素因数の和:877

約数の個数: 144

約数和(自身を含む): 74299680

約数和(自身を除く): 53760960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 30, 32, 34, 36, 40, 45, 48, 51, 60, 68, 72, 80, 85, 90, 96, 102, 120, 136, 144, 153, 160, 170, 180, 204, 240, 255, 272, 288, 306, 340, 360, 408, 480, 510, 544, 612, 680, 720, 765, 816, 839, 1020, 1224, 1360, 1440, 1530, 1632, 1678, 2040, 2448, 2517, 2720, 3060, 3356, 4080, 4195, 4896, 5034, 6120, 6712, 7551, 8160, 8390, 10068, 12240, 12585, 13424, 14263, 15102, 16780, 20136, 24480, 25170, 26848, 28526, 30204, 33560, 37755, 40272, 42789, 50340, 57052, 60408, 67120, 71315, 75510, 80544, 85578, 100680, 114104, 120816, 128367, 134240, 142630, 151020, 171156, 201360, 213945, 228208, 241632, 256734, 285260, 302040, 342312, 402720, 427890, 456416, 513468, 570520, 604080, 641835, 684624, 855780, 1026936, 1141040, 1208160, 1283670, 1369248, 1711560, 2053872, 2282080, 2567340, 3423120, 4107744, 5134680, 6846240, 10269360, 20538720]

約数ペア:

[(1, 20538720), (2, 10269360), (3, 6846240), (4, 5134680), (5, 4107744), (6, 3423120), (8, 2567340), (9, 2282080), (10, 2053872), (12, 1711560), (15, 1369248), (16, 1283670), (17, 1208160), (18, 1141040), (20, 1026936), (24, 855780), (30, 684624), (32, 641835), (34, 604080), (36, 570520), (40, 513468), (45, 456416), (48, 427890), (51, 402720), (60, 342312), (68, 302040), (72, 285260), (80, 256734), (85, 241632), (90, 228208), (96, 213945), (102, 201360), (120, 171156), (136, 151020), (144, 142630), (153, 134240), (160, 128367), (170, 120816), (180, 114104), (204, 100680), (240, 85578), (255, 80544), (272, 75510), (288, 71315), (306, 67120), (340, 60408), (360, 57052), (408, 50340), (480, 42789), (510, 40272), (544, 37755), (612, 33560), (680, 30204), (720, 28526), (765, 26848), (816, 25170), (839, 24480), (1020, 20136), (1224, 16780), (1360, 15102), (1440, 14263), (1530, 13424), (1632, 12585), (1678, 12240), (2040, 10068), (2448, 8390), (2517, 8160), (2720, 7551), (3060, 6712), (3356, 6120), (4080, 5034), (4195, 4896)]