256380215

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 395399424

約数和(自身を除く): 139019209

約数列:

[1, 5, 7, 13, 35, 37, 65, 91, 97, 157, 185, 259, 455, 481, 485, 679, 785, 1099, 1261, 1295, 2041, 2405, 3367, 3395, 3589, 5495, 5809, 6305, 8827, 10205, 14287, 15229, 16835, 17945, 25123, 29045, 40663, 44135, 46657, 71435, 75517, 76145, 106603, 125615, 197977, 203315, 233285, 326599, 377585, 528619, 533015, 563473, 989885, 1385839, 1632995, 2643095, 2817365, 3944311, 6929195, 7325149, 19721555, 36625745, 51276043, 256380215]

約数ペア:

[(1, 256380215), (5, 51276043), (7, 36625745), (13, 19721555), (35, 7325149), (37, 6929195), (65, 3944311), (91, 2817365), (97, 2643095), (157, 1632995), (185, 1385839), (259, 989885), (455, 563473), (481, 533015), (485, 528619), (679, 377585), (785, 326599), (1099, 233285), (1261, 203315), (1295, 197977), (2041, 125615), (2405, 106603), (3367, 76145), (3395, 75517), (3589, 71435), (5495, 46657), (5809, 44135), (6305, 40663), (8827, 29045), (10205, 25123), (14287, 17945), (15229, 16835)]