256479440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{19913}}^1$

素因数の和:19956

約数の個数: 80

約数和(自身を含む): 711168768

約数和(自身を除く): 454689328

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1840, 2576, 3220, 6440, 12880, 19913, 39826, 79652, 99565, 139391, 159304, 199130, 278782, 318608, 398260, 457999, 557564, 696955, 796520, 915998, 1115128, 1393910, 1593040, 1831996, 2230256, 2289995, 2787820, 3205993, 3663992, 4579990, 5575640, 6411986, 7327984, 9159980, 11151280, 12823972, 16029965, 18319960, 25647944, 32059930, 36639920, 51295888, 64119860, 128239720, 256479440]

約数ペア:

[(1, 256479440), (2, 128239720), (4, 64119860), (5, 51295888), (7, 36639920), (8, 32059930), (10, 25647944), (14, 18319960), (16, 16029965), (20, 12823972), (23, 11151280), (28, 9159980), (35, 7327984), (40, 6411986), (46, 5575640), (56, 4579990), (70, 3663992), (80, 3205993), (92, 2787820), (112, 2289995), (115, 2230256), (140, 1831996), (161, 1593040), (184, 1393910), (230, 1115128), (280, 915998), (322, 796520), (368, 696955), (460, 557564), (560, 457999), (644, 398260), (805, 318608), (920, 278782), (1288, 199130), (1610, 159304), (1840, 139391), (2576, 99565), (3220, 79652), (6440, 39826), (12880, 19913)]