21505848

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1$

素因数の和:301

約数の個数: 128

約数和(自身を含む): 68006400

約数和(自身を除く): 46500552

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 13, 14, 21, 24, 26, 28, 39, 42, 43, 52, 56, 78, 84, 86, 91, 104, 129, 156, 168, 172, 182, 229, 258, 273, 301, 312, 344, 364, 458, 516, 546, 559, 602, 687, 728, 903, 916, 1032, 1092, 1118, 1204, 1374, 1603, 1677, 1806, 1832, 2184, 2236, 2408, 2748, 2977, 3206, 3354, 3612, 3913, 4472, 4809, 5496, 5954, 6412, 6708, 7224, 7826, 8931, 9618, 9847, 11739, 11908, 12824, 13416, 15652, 17862, 19236, 19694, 20839, 23478, 23816, 29541, 31304, 35724, 38472, 39388, 41678, 46956, 59082, 62517, 68929, 71448, 78776, 83356, 93912, 118164, 125034, 128011, 137858, 166712, 206787, 236328, 250068, 256022, 275716, 384033, 413574, 500136, 512044, 551432, 768066, 827148, 896077, 1024088, 1536132, 1654296, 1792154, 2688231, 3072264, 3584308, 5376462, 7168616, 10752924, 21505848]

約数ペア:

[(1, 21505848), (2, 10752924), (3, 7168616), (4, 5376462), (6, 3584308), (7, 3072264), (8, 2688231), (12, 1792154), (13, 1654296), (14, 1536132), (21, 1024088), (24, 896077), (26, 827148), (28, 768066), (39, 551432), (42, 512044), (43, 500136), (52, 413574), (56, 384033), (78, 275716), (84, 256022), (86, 250068), (91, 236328), (104, 206787), (129, 166712), (156, 137858), (168, 128011), (172, 125034), (182, 118164), (229, 93912), (258, 83356), (273, 78776), (301, 71448), (312, 68929), (344, 62517), (364, 59082), (458, 46956), (516, 41678), (546, 39388), (559, 38472), (602, 35724), (687, 31304), (728, 29541), (903, 23816), (916, 23478), (1032, 20839), (1092, 19694), (1118, 19236), (1204, 17862), (1374, 15652), (1603, 13416), (1677, 12824), (1806, 11908), (1832, 11739), (2184, 9847), (2236, 9618), (2408, 8931), (2748, 7826), (2977, 7224), (3206, 6708), (3354, 6412), (3612, 5954), (3913, 5496), (4472, 4809)]