21893781

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 37478400

約数和(自身を除く): 15584619

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 169, 199, 217, 273, 403, 507, 597, 651, 1183, 1209, 1393, 2587, 2821, 3549, 4179, 5239, 6169, 7761, 8463, 15717, 18109, 18507, 33631, 36673, 43183, 54327, 80197, 100893, 110019, 129549, 235417, 240591, 561379, 706251, 1042561, 1684137, 3127683, 7297927, 21893781]

約数ペア:

[(1, 21893781), (3, 7297927), (7, 3127683), (13, 1684137), (21, 1042561), (31, 706251), (39, 561379), (91, 240591), (93, 235417), (169, 129549), (199, 110019), (217, 100893), (273, 80197), (403, 54327), (507, 43183), (597, 36673), (651, 33631), (1183, 18507), (1209, 18109), (1393, 15717), (2587, 8463), (2821, 7761), (3549, 6169), (4179, 5239)]