21208376

素因数分解:

$2^3\times 7^3\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 26311624

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 59, 98, 118, 131, 196, 236, 262, 343, 392, 413, 472, 524, 686, 826, 917, 1048, 1372, 1652, 1834, 2744, 2891, 3304, 3668, 5782, 6419, 7336, 7729, 11564, 12838, 15458, 20237, 23128, 25676, 30916, 40474, 44933, 51352, 54103, 61832, 80948, 89866, 108206, 161896, 179732, 216412, 359464, 378721, 432824, 757442, 1514884, 2651047, 3029768, 5302094, 10604188, 21208376]

約数ペア:

[(1, 21208376), (2, 10604188), (4, 5302094), (7, 3029768), (8, 2651047), (14, 1514884), (28, 757442), (49, 432824), (56, 378721), (59, 359464), (98, 216412), (118, 179732), (131, 161896), (196, 108206), (236, 89866), (262, 80948), (343, 61832), (392, 54103), (413, 51352), (472, 44933), (524, 40474), (686, 30916), (826, 25676), (917, 23128), (1048, 20237), (1372, 15458), (1652, 12838), (1834, 11564), (2744, 7729), (2891, 7336), (3304, 6419), (3668, 5782)]