20325305

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:198

約数の個数: 64

約数和(自身を含む): 34062336

約数和(自身を除く): 13737031

約数列:

[1, 5, 7, 11, 13, 31, 35, 55, 65, 77, 91, 131, 143, 155, 217, 341, 385, 403, 455, 655, 715, 917, 1001, 1085, 1441, 1703, 1705, 2015, 2387, 2821, 4061, 4433, 4585, 5005, 7205, 8515, 10087, 11921, 11935, 14105, 18733, 20305, 22165, 28427, 31031, 44671, 50435, 52793, 59605, 93665, 131131, 142135, 155155, 223355, 263965, 312697, 369551, 580723, 655655, 1563485, 1847755, 2903615, 4065061, 20325305]

約数ペア:

[(1, 20325305), (5, 4065061), (7, 2903615), (11, 1847755), (13, 1563485), (31, 655655), (35, 580723), (55, 369551), (65, 312697), (77, 263965), (91, 223355), (131, 155155), (143, 142135), (155, 131131), (217, 93665), (341, 59605), (385, 52793), (403, 50435), (455, 44671), (655, 31031), (715, 28427), (917, 22165), (1001, 20305), (1085, 18733), (1441, 14105), (1703, 11935), (1705, 11921), (2015, 10087), (2387, 8515), (2821, 7205), (4061, 5005), (4433, 4585)]