256222720

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{7699}}^1$

素因数の和:7735

約数の個数: 80

約数和(自身を含む): 661676400

約数和(自身を除く): 405453680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 832, 1040, 1280, 1664, 2080, 2560, 3328, 4160, 6656, 7699, 8320, 15398, 16640, 30796, 33280, 38495, 61592, 76990, 100087, 123184, 153980, 200174, 246368, 307960, 400348, 492736, 500435, 615920, 800696, 985472, 1000870, 1231840, 1601392, 1970944, 2001740, 2463680, 3202784, 3941888, 4003480, 4927360, 6405568, 8006960, 9854720, 12811136, 16013920, 19709440, 25622272, 32027840, 51244544, 64055680, 128111360, 256222720]

約数ペア:

[(1, 256222720), (2, 128111360), (4, 64055680), (5, 51244544), (8, 32027840), (10, 25622272), (13, 19709440), (16, 16013920), (20, 12811136), (26, 9854720), (32, 8006960), (40, 6405568), (52, 4927360), (64, 4003480), (65, 3941888), (80, 3202784), (104, 2463680), (128, 2001740), (130, 1970944), (160, 1601392), (208, 1231840), (256, 1000870), (260, 985472), (320, 800696), (416, 615920), (512, 500435), (520, 492736), (640, 400348), (832, 307960), (1040, 246368), (1280, 200174), (1664, 153980), (2080, 123184), (2560, 100087), (3328, 76990), (4160, 61592), (6656, 38495), (7699, 33280), (8320, 30796), (15398, 16640)]