21051216

素因数分解:

$2^4\times 3^2\times {\mathrm{29}}^1\times {\mathrm{71}}^2$

素因数の和:185

約数の個数: 90

約数和(自身を含む): 61816170

約数和(自身を除く): 40764954

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 29, 36, 48, 58, 71, 72, 87, 116, 142, 144, 174, 213, 232, 261, 284, 348, 426, 464, 522, 568, 639, 696, 852, 1044, 1136, 1278, 1392, 1704, 2059, 2088, 2556, 3408, 4118, 4176, 5041, 5112, 6177, 8236, 10082, 10224, 12354, 15123, 16472, 18531, 20164, 24708, 30246, 32944, 37062, 40328, 45369, 49416, 60492, 74124, 80656, 90738, 98832, 120984, 146189, 148248, 181476, 241968, 292378, 296496, 362952, 438567, 584756, 725904, 877134, 1169512, 1315701, 1754268, 2339024, 2631402, 3508536, 5262804, 7017072, 10525608, 21051216]

約数ペア:

[(1, 21051216), (2, 10525608), (3, 7017072), (4, 5262804), (6, 3508536), (8, 2631402), (9, 2339024), (12, 1754268), (16, 1315701), (18, 1169512), (24, 877134), (29, 725904), (36, 584756), (48, 438567), (58, 362952), (71, 296496), (72, 292378), (87, 241968), (116, 181476), (142, 148248), (144, 146189), (174, 120984), (213, 98832), (232, 90738), (261, 80656), (284, 74124), (348, 60492), (426, 49416), (464, 45369), (522, 40328), (568, 37062), (639, 32944), (696, 30246), (852, 24708), (1044, 20164), (1136, 18531), (1278, 16472), (1392, 15123), (1704, 12354), (2059, 10224), (2088, 10082), (2556, 8236), (3408, 6177), (4118, 5112), (4176, 5041)]