256947145

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:662

約数の個数: 64

約数和(自身を含む): 405909504

約数和(自身を除く): 148962359

約数列:

[1, 5, 7, 13, 23, 35, 43, 65, 91, 115, 161, 215, 299, 301, 455, 559, 571, 805, 989, 1495, 1505, 2093, 2795, 2855, 3913, 3997, 4945, 6923, 7423, 10465, 12857, 13133, 19565, 19985, 24553, 34615, 37115, 51961, 64285, 65665, 89999, 91931, 122765, 170729, 171871, 259805, 319189, 449995, 459655, 564719, 853645, 859355, 1195103, 1595945, 2234323, 2823595, 3953033, 5975515, 7341347, 11171615, 19765165, 36706735, 51389429, 256947145]

約数ペア:

[(1, 256947145), (5, 51389429), (7, 36706735), (13, 19765165), (23, 11171615), (35, 7341347), (43, 5975515), (65, 3953033), (91, 2823595), (115, 2234323), (161, 1595945), (215, 1195103), (299, 859355), (301, 853645), (455, 564719), (559, 459655), (571, 449995), (805, 319189), (989, 259805), (1495, 171871), (1505, 170729), (2093, 122765), (2795, 91931), (2855, 89999), (3913, 65665), (3997, 64285), (4945, 51961), (6923, 37115), (7423, 34615), (10465, 24553), (12857, 19985), (13133, 19565)]