77776660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{769}}^1$

素因数の和:1180

約数の個数: 48

約数和(自身を含む): 176576400

約数和(自身を除く): 98799740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 389, 769, 778, 1538, 1556, 1945, 3076, 3845, 3890, 5057, 7690, 7780, 9997, 10114, 15380, 19994, 20228, 25285, 39988, 49985, 50570, 99970, 101140, 199940, 299141, 598282, 1196564, 1495705, 2991410, 3888833, 5982820, 7777666, 15555332, 19444165, 38888330, 77776660]

約数ペア:

[(1, 77776660), (2, 38888330), (4, 19444165), (5, 15555332), (10, 7777666), (13, 5982820), (20, 3888833), (26, 2991410), (52, 1495705), (65, 1196564), (130, 598282), (260, 299141), (389, 199940), (769, 101140), (778, 99970), (1538, 50570), (1556, 49985), (1945, 39988), (3076, 25285), (3845, 20228), (3890, 19994), (5057, 15380), (7690, 10114), (7780, 9997)]