261550185

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{307}}^1$

素因数の和:602

約数の個数: 64

約数和(自身を含む): 480598272

約数和(自身を除く): 219048087

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 257, 307, 663, 771, 921, 1105, 1285, 1535, 3315, 3341, 3855, 3991, 4369, 4605, 5219, 10023, 11973, 13107, 15657, 16705, 19955, 21845, 26095, 50115, 56797, 59865, 65535, 67847, 78285, 78899, 170391, 203541, 236697, 283985, 339235, 394495, 851955, 1017705, 1025687, 1183485, 1341283, 3077061, 4023849, 5128435, 6706415, 15385305, 17436679, 20119245, 52310037, 87183395, 261550185]

約数ペア:

[(1, 261550185), (3, 87183395), (5, 52310037), (13, 20119245), (15, 17436679), (17, 15385305), (39, 6706415), (51, 5128435), (65, 4023849), (85, 3077061), (195, 1341283), (221, 1183485), (255, 1025687), (257, 1017705), (307, 851955), (663, 394495), (771, 339235), (921, 283985), (1105, 236697), (1285, 203541), (1535, 170391), (3315, 78899), (3341, 78285), (3855, 67847), (3991, 65535), (4369, 59865), (4605, 56797), (5219, 50115), (10023, 26095), (11973, 21845), (13107, 19955), (15657, 16705)]