28870101

素因数分解:

$3^5\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:97

約数の個数: 72

約数和(自身を含む): 50625120

約数和(自身を除く): 21755019

約数列:

[1, 3, 9, 13, 19, 27, 37, 39, 57, 81, 111, 117, 169, 171, 243, 247, 333, 351, 481, 507, 513, 703, 741, 999, 1053, 1443, 1521, 1539, 2109, 2223, 2997, 3159, 3211, 4329, 4563, 4617, 6253, 6327, 6669, 8991, 9139, 9633, 12987, 13689, 18759, 18981, 20007, 27417, 28899, 38961, 41067, 56277, 56943, 60021, 82251, 86697, 116883, 118807, 168831, 170829, 246753, 260091, 356421, 506493, 740259, 780273, 1069263, 1519479, 2220777, 3207789, 9623367, 28870101]

約数ペア:

[(1, 28870101), (3, 9623367), (9, 3207789), (13, 2220777), (19, 1519479), (27, 1069263), (37, 780273), (39, 740259), (57, 506493), (81, 356421), (111, 260091), (117, 246753), (169, 170829), (171, 168831), (243, 118807), (247, 116883), (333, 86697), (351, 82251), (481, 60021), (507, 56943), (513, 56277), (703, 41067), (741, 38961), (999, 28899), (1053, 27417), (1443, 20007), (1521, 18981), (1539, 18759), (2109, 13689), (2223, 12987), (2997, 9633), (3159, 9139), (3211, 8991), (4329, 6669), (4563, 6327), (4617, 6253)]