21857760

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{353}}^1$

素因数の和:417

約数の個数: 144

約数和(自身を含む): 76540464

約数和(自身を除く): 54682704

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 43, 45, 48, 60, 72, 80, 86, 90, 96, 120, 129, 144, 160, 172, 180, 215, 240, 258, 288, 344, 353, 360, 387, 430, 480, 516, 645, 688, 706, 720, 774, 860, 1032, 1059, 1290, 1376, 1412, 1440, 1548, 1720, 1765, 1935, 2064, 2118, 2580, 2824, 3096, 3177, 3440, 3530, 3870, 4128, 4236, 5160, 5295, 5648, 6192, 6354, 6880, 7060, 7740, 8472, 10320, 10590, 11296, 12384, 12708, 14120, 15179, 15480, 15885, 16944, 20640, 21180, 25416, 28240, 30358, 30960, 31770, 33888, 42360, 45537, 50832, 56480, 60716, 61920, 63540, 75895, 84720, 91074, 101664, 121432, 127080, 136611, 151790, 169440, 182148, 227685, 242864, 254160, 273222, 303580, 364296, 455370, 485728, 508320, 546444, 607160, 683055, 728592, 910740, 1092888, 1214320, 1366110, 1457184, 1821480, 2185776, 2428640, 2732220, 3642960, 4371552, 5464440, 7285920, 10928880, 21857760]

約数ペア:

[(1, 21857760), (2, 10928880), (3, 7285920), (4, 5464440), (5, 4371552), (6, 3642960), (8, 2732220), (9, 2428640), (10, 2185776), (12, 1821480), (15, 1457184), (16, 1366110), (18, 1214320), (20, 1092888), (24, 910740), (30, 728592), (32, 683055), (36, 607160), (40, 546444), (43, 508320), (45, 485728), (48, 455370), (60, 364296), (72, 303580), (80, 273222), (86, 254160), (90, 242864), (96, 227685), (120, 182148), (129, 169440), (144, 151790), (160, 136611), (172, 127080), (180, 121432), (215, 101664), (240, 91074), (258, 84720), (288, 75895), (344, 63540), (353, 61920), (360, 60716), (387, 56480), (430, 50832), (480, 45537), (516, 42360), (645, 33888), (688, 31770), (706, 30960), (720, 30358), (774, 28240), (860, 25416), (1032, 21180), (1059, 20640), (1290, 16944), (1376, 15885), (1412, 15480), (1440, 15179), (1548, 14120), (1720, 12708), (1765, 12384), (1935, 11296), (2064, 10590), (2118, 10320), (2580, 8472), (2824, 7740), (3096, 7060), (3177, 6880), (3440, 6354), (3530, 6192), (3870, 5648), (4128, 5295), (4236, 5160)]