28140021

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{881}}^1$

素因数の和:923

約数の個数: 48

約数和(自身を含む): 51649920

約数和(自身を除く): 23509899

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 169, 189, 273, 351, 507, 819, 881, 1183, 1521, 2457, 2643, 3549, 4563, 6167, 7929, 10647, 11453, 18501, 23787, 31941, 34359, 55503, 80171, 103077, 148889, 166509, 240513, 309231, 446667, 721539, 1042223, 1340001, 2164617, 3126669, 4020003, 9380007, 28140021]

約数ペア:

[(1, 28140021), (3, 9380007), (7, 4020003), (9, 3126669), (13, 2164617), (21, 1340001), (27, 1042223), (39, 721539), (63, 446667), (91, 309231), (117, 240513), (169, 166509), (189, 148889), (273, 103077), (351, 80171), (507, 55503), (819, 34359), (881, 31941), (1183, 23787), (1521, 18501), (2457, 11453), (2643, 10647), (3549, 7929), (4563, 6167)]