21801339

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^2$

素因数の和:169

約数の個数: 48

約数和(自身を含む): 38737920

約数和(自身を除く): 16936581

約数列:

[1, 3, 7, 9, 21, 27, 31, 61, 63, 93, 183, 189, 217, 279, 427, 549, 651, 837, 1281, 1647, 1891, 1953, 3721, 3843, 5673, 5859, 11163, 11529, 13237, 17019, 26047, 33489, 39711, 51057, 78141, 100467, 115351, 119133, 234423, 346053, 357399, 703269, 807457, 1038159, 2422371, 3114477, 7267113, 21801339]

約数ペア:

[(1, 21801339), (3, 7267113), (7, 3114477), (9, 2422371), (21, 1038159), (27, 807457), (31, 703269), (61, 357399), (63, 346053), (93, 234423), (183, 119133), (189, 115351), (217, 100467), (279, 78141), (427, 51057), (549, 39711), (651, 33489), (837, 26047), (1281, 17019), (1647, 13237), (1891, 11529), (1953, 11163), (3721, 5859), (3843, 5673)]