21038985

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2237}}^1$

素因数の和:2278

約数の個数: 48

約数和(自身を含む): 41895360

約数和(自身を除く): 20856375

約数列:

[1, 3, 5, 9, 11, 15, 19, 33, 45, 55, 57, 95, 99, 165, 171, 209, 285, 495, 627, 855, 1045, 1881, 2237, 3135, 6711, 9405, 11185, 20133, 24607, 33555, 42503, 73821, 100665, 123035, 127509, 212515, 221463, 369105, 382527, 467533, 637545, 1107315, 1402599, 1912635, 2337665, 4207797, 7012995, 21038985]

約数ペア:

[(1, 21038985), (3, 7012995), (5, 4207797), (9, 2337665), (11, 1912635), (15, 1402599), (19, 1107315), (33, 637545), (45, 467533), (55, 382527), (57, 369105), (95, 221463), (99, 212515), (165, 127509), (171, 123035), (209, 100665), (285, 73821), (495, 42503), (627, 33555), (855, 24607), (1045, 20133), (1881, 11185), (2237, 9405), (3135, 6711)]