257520440

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{163}}^1\times {\mathrm{311}}^1$

素因数の和:612

約数の個数: 64

約数和(自身を含む): 589455360

約数和(自身を除く): 331934920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 163, 254, 311, 326, 508, 622, 635, 652, 815, 1016, 1244, 1270, 1304, 1555, 1630, 2488, 2540, 3110, 3260, 5080, 6220, 6520, 12440, 20701, 39497, 41402, 50693, 78994, 82804, 101386, 103505, 157988, 165608, 197485, 202772, 207010, 253465, 315976, 394970, 405544, 414020, 506930, 789940, 828040, 1013860, 1579880, 2027720, 6438011, 12876022, 25752044, 32190055, 51504088, 64380110, 128760220, 257520440]

約数ペア:

[(1, 257520440), (2, 128760220), (4, 64380110), (5, 51504088), (8, 32190055), (10, 25752044), (20, 12876022), (40, 6438011), (127, 2027720), (163, 1579880), (254, 1013860), (311, 828040), (326, 789940), (508, 506930), (622, 414020), (635, 405544), (652, 394970), (815, 315976), (1016, 253465), (1244, 207010), (1270, 202772), (1304, 197485), (1555, 165608), (1630, 157988), (2488, 103505), (2540, 101386), (3110, 82804), (3260, 78994), (5080, 50693), (6220, 41402), (6520, 39497), (12440, 20701)]