21086541

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:167

約数の個数: 64

約数和(自身を含む): 38092800

約数和(自身を除く): 17006259

約数列:

[1, 3, 7, 9, 21, 27, 31, 59, 61, 63, 93, 177, 183, 189, 217, 279, 413, 427, 531, 549, 651, 837, 1239, 1281, 1593, 1647, 1829, 1891, 1953, 3599, 3717, 3843, 5487, 5673, 5859, 10797, 11151, 11529, 12803, 13237, 16461, 17019, 25193, 32391, 38409, 39711, 49383, 51057, 75579, 97173, 111569, 115227, 119133, 226737, 334707, 345681, 357399, 680211, 780983, 1004121, 2342949, 3012363, 7028847, 21086541]

約数ペア:

[(1, 21086541), (3, 7028847), (7, 3012363), (9, 2342949), (21, 1004121), (27, 780983), (31, 680211), (59, 357399), (61, 345681), (63, 334707), (93, 226737), (177, 119133), (183, 115227), (189, 111569), (217, 97173), (279, 75579), (413, 51057), (427, 49383), (531, 39711), (549, 38409), (651, 32391), (837, 25193), (1239, 17019), (1281, 16461), (1593, 13237), (1647, 12803), (1829, 11529), (1891, 11151), (1953, 10797), (3599, 5859), (3717, 5673), (3843, 5487)]