21491694

素因数分解:

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

素因数の和:147

約数の個数: 72

約数和(自身を含む): 55239600

約数和(自身を除く): 33747906

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 59, 63, 98, 118, 126, 147, 177, 294, 343, 354, 413, 441, 531, 686, 826, 882, 1029, 1062, 1239, 2058, 2478, 2891, 3087, 3481, 3717, 5782, 6174, 6962, 7434, 8673, 10443, 17346, 20237, 20886, 24367, 26019, 31329, 40474, 48734, 52038, 60711, 62658, 73101, 121422, 146202, 170569, 182133, 219303, 341138, 364266, 438606, 511707, 1023414, 1193983, 1535121, 2387966, 3070242, 3581949, 7163898, 10745847, 21491694]

約数ペア:

[(1, 21491694), (2, 10745847), (3, 7163898), (6, 3581949), (7, 3070242), (9, 2387966), (14, 1535121), (18, 1193983), (21, 1023414), (42, 511707), (49, 438606), (59, 364266), (63, 341138), (98, 219303), (118, 182133), (126, 170569), (147, 146202), (177, 121422), (294, 73101), (343, 62658), (354, 60711), (413, 52038), (441, 48734), (531, 40474), (686, 31329), (826, 26019), (882, 24367), (1029, 20886), (1062, 20237), (1239, 17346), (2058, 10443), (2478, 8673), (2891, 7434), (3087, 6962), (3481, 6174), (3717, 5782)]