21578130

素因数分解:

$2^1\times 3^3\times 5^1\times 7^3\times {\mathrm{233}}^1$

素因数の和:270

約数の個数: 128

約数和(自身を含む): 67392000

約数和(自身を除く): 45813870

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, 233, 245, 270, 294, 315, 343, 378, 441, 466, 490, 630, 686, 699, 735, 882, 945, 1029, 1165, 1323, 1398, 1470, 1631, 1715, 1890, 2058, 2097, 2205, 2330, 2646, 3087, 3262, 3430, 3495, 4194, 4410, 4893, 5145, 6174, 6291, 6615, 6990, 8155, 9261, 9786, 10290, 10485, 11417, 12582, 13230, 14679, 15435, 16310, 18522, 20970, 22834, 24465, 29358, 30870, 31455, 34251, 44037, 46305, 48930, 57085, 62910, 68502, 73395, 79919, 88074, 92610, 102753, 114170, 146790, 159838, 171255, 205506, 220185, 239757, 308259, 342510, 399595, 440370, 479514, 513765, 616518, 719271, 799190, 1027530, 1198785, 1438542, 1541295, 2157813, 2397570, 3082590, 3596355, 4315626, 7192710, 10789065, 21578130]

約数ペア:

[(1, 21578130), (2, 10789065), (3, 7192710), (5, 4315626), (6, 3596355), (7, 3082590), (9, 2397570), (10, 2157813), (14, 1541295), (15, 1438542), (18, 1198785), (21, 1027530), (27, 799190), (30, 719271), (35, 616518), (42, 513765), (45, 479514), (49, 440370), (54, 399595), (63, 342510), (70, 308259), (90, 239757), (98, 220185), (105, 205506), (126, 171255), (135, 159838), (147, 146790), (189, 114170), (210, 102753), (233, 92610), (245, 88074), (270, 79919), (294, 73395), (315, 68502), (343, 62910), (378, 57085), (441, 48930), (466, 46305), (490, 44037), (630, 34251), (686, 31455), (699, 30870), (735, 29358), (882, 24465), (945, 22834), (1029, 20970), (1165, 18522), (1323, 16310), (1398, 15435), (1470, 14679), (1631, 13230), (1715, 12582), (1890, 11417), (2058, 10485), (2097, 10290), (2205, 9786), (2330, 9261), (2646, 8155), (3087, 6990), (3262, 6615), (3430, 6291), (3495, 6174), (4194, 5145), (4410, 4893)]