28320760

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{509}}^1$

素因数の和:640

約数の個数: 64

約数和(自身を含む): 69400800

約数和(自身を除く): 41080040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 107, 130, 214, 260, 428, 509, 520, 535, 856, 1018, 1070, 1391, 2036, 2140, 2545, 2782, 4072, 4280, 5090, 5564, 6617, 6955, 10180, 11128, 13234, 13910, 20360, 26468, 27820, 33085, 52936, 54463, 55640, 66170, 108926, 132340, 217852, 264680, 272315, 435704, 544630, 708019, 1089260, 1416038, 2178520, 2832076, 3540095, 5664152, 7080190, 14160380, 28320760]

約数ペア:

[(1, 28320760), (2, 14160380), (4, 7080190), (5, 5664152), (8, 3540095), (10, 2832076), (13, 2178520), (20, 1416038), (26, 1089260), (40, 708019), (52, 544630), (65, 435704), (104, 272315), (107, 264680), (130, 217852), (214, 132340), (260, 108926), (428, 66170), (509, 55640), (520, 54463), (535, 52936), (856, 33085), (1018, 27820), (1070, 26468), (1391, 20360), (2036, 13910), (2140, 13234), (2545, 11128), (2782, 10180), (4072, 6955), (4280, 6617), (5090, 5564)]