21207690

素因数分解:

$2^1\times 3^3\times 5^1\times 7^3\times {\mathrm{229}}^1$

素因数の和:266

約数の個数: 128

約数和(自身を含む): 66240000

約数和(自身を除く): 45032310

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 49, 54, 63, 70, 90, 98, 105, 126, 135, 147, 189, 210, 229, 245, 270, 294, 315, 343, 378, 441, 458, 490, 630, 686, 687, 735, 882, 945, 1029, 1145, 1323, 1374, 1470, 1603, 1715, 1890, 2058, 2061, 2205, 2290, 2646, 3087, 3206, 3430, 3435, 4122, 4410, 4809, 5145, 6174, 6183, 6615, 6870, 8015, 9261, 9618, 10290, 10305, 11221, 12366, 13230, 14427, 15435, 16030, 18522, 20610, 22442, 24045, 28854, 30870, 30915, 33663, 43281, 46305, 48090, 56105, 61830, 67326, 72135, 78547, 86562, 92610, 100989, 112210, 144270, 157094, 168315, 201978, 216405, 235641, 302967, 336630, 392735, 432810, 471282, 504945, 605934, 706923, 785470, 1009890, 1178205, 1413846, 1514835, 2120769, 2356410, 3029670, 3534615, 4241538, 7069230, 10603845, 21207690]

約数ペア:

[(1, 21207690), (2, 10603845), (3, 7069230), (5, 4241538), (6, 3534615), (7, 3029670), (9, 2356410), (10, 2120769), (14, 1514835), (15, 1413846), (18, 1178205), (21, 1009890), (27, 785470), (30, 706923), (35, 605934), (42, 504945), (45, 471282), (49, 432810), (54, 392735), (63, 336630), (70, 302967), (90, 235641), (98, 216405), (105, 201978), (126, 168315), (135, 157094), (147, 144270), (189, 112210), (210, 100989), (229, 92610), (245, 86562), (270, 78547), (294, 72135), (315, 67326), (343, 61830), (378, 56105), (441, 48090), (458, 46305), (490, 43281), (630, 33663), (686, 30915), (687, 30870), (735, 28854), (882, 24045), (945, 22442), (1029, 20610), (1145, 18522), (1323, 16030), (1374, 15435), (1470, 14427), (1603, 13230), (1715, 12366), (1890, 11221), (2058, 10305), (2061, 10290), (2205, 9618), (2290, 9261), (2646, 8015), (3087, 6870), (3206, 6615), (3430, 6183), (3435, 6174), (4122, 5145), (4410, 4809)]