28003209

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 41664000

約数和(自身を除く): 13660791

約数列:

[1, 3, 13, 39, 61, 79, 149, 183, 237, 447, 793, 1027, 1937, 2379, 3081, 4819, 5811, 9089, 11771, 14457, 27267, 35313, 62647, 118157, 153023, 187941, 354471, 459069, 718031, 2154093, 9334403, 28003209]

約数ペア:

[(1, 28003209), (3, 9334403), (13, 2154093), (39, 718031), (61, 459069), (79, 354471), (149, 187941), (183, 153023), (237, 118157), (447, 62647), (793, 35313), (1027, 27267), (1937, 14457), (2379, 11771), (3081, 9089), (4819, 5811)]