21560877

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:155

約数の個数: 64

約数和(自身を含む): 37497600

約数和(自身を除く): 15936723

約数列:

[1, 3, 9, 13, 19, 27, 39, 53, 57, 61, 117, 159, 171, 183, 247, 351, 477, 513, 549, 689, 741, 793, 1007, 1159, 1431, 1647, 2067, 2223, 2379, 3021, 3233, 3477, 6201, 6669, 7137, 9063, 9699, 10431, 13091, 15067, 18603, 21411, 27189, 29097, 31293, 39273, 42029, 45201, 61427, 87291, 117819, 126087, 135603, 184281, 353457, 378261, 406809, 552843, 798551, 1134783, 1658529, 2395653, 7186959, 21560877]

約数ペア:

[(1, 21560877), (3, 7186959), (9, 2395653), (13, 1658529), (19, 1134783), (27, 798551), (39, 552843), (53, 406809), (57, 378261), (61, 353457), (117, 184281), (159, 135603), (171, 126087), (183, 117819), (247, 87291), (351, 61427), (477, 45201), (513, 42029), (549, 39273), (689, 31293), (741, 29097), (793, 27189), (1007, 21411), (1159, 18603), (1431, 15067), (1647, 13091), (2067, 10431), (2223, 9699), (2379, 9063), (3021, 7137), (3233, 6669), (3477, 6201)]