21145680

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{683}}^1$

素因数の和:745

約数の個数: 120

約数和(自身を含む): 72772128

約数和(自身を除く): 51626448

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 43, 45, 48, 60, 72, 80, 86, 90, 120, 129, 144, 172, 180, 215, 240, 258, 344, 360, 387, 430, 516, 645, 683, 688, 720, 774, 860, 1032, 1290, 1366, 1548, 1720, 1935, 2049, 2064, 2580, 2732, 3096, 3415, 3440, 3870, 4098, 5160, 5464, 6147, 6192, 6830, 7740, 8196, 10245, 10320, 10928, 12294, 13660, 15480, 16392, 20490, 24588, 27320, 29369, 30735, 30960, 32784, 40980, 49176, 54640, 58738, 61470, 81960, 88107, 98352, 117476, 122940, 146845, 163920, 176214, 234952, 245880, 264321, 293690, 352428, 440535, 469904, 491760, 528642, 587380, 704856, 881070, 1057284, 1174760, 1321605, 1409712, 1762140, 2114568, 2349520, 2643210, 3524280, 4229136, 5286420, 7048560, 10572840, 21145680]

約数ペア:

[(1, 21145680), (2, 10572840), (3, 7048560), (4, 5286420), (5, 4229136), (6, 3524280), (8, 2643210), (9, 2349520), (10, 2114568), (12, 1762140), (15, 1409712), (16, 1321605), (18, 1174760), (20, 1057284), (24, 881070), (30, 704856), (36, 587380), (40, 528642), (43, 491760), (45, 469904), (48, 440535), (60, 352428), (72, 293690), (80, 264321), (86, 245880), (90, 234952), (120, 176214), (129, 163920), (144, 146845), (172, 122940), (180, 117476), (215, 98352), (240, 88107), (258, 81960), (344, 61470), (360, 58738), (387, 54640), (430, 49176), (516, 40980), (645, 32784), (683, 30960), (688, 30735), (720, 29369), (774, 27320), (860, 24588), (1032, 20490), (1290, 16392), (1366, 15480), (1548, 13660), (1720, 12294), (1935, 10928), (2049, 10320), (2064, 10245), (2580, 8196), (2732, 7740), (3096, 6830), (3415, 6192), (3440, 6147), (3870, 5464), (4098, 5160)]