20138820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25819}}^1$

素因数の和:25844

約数の個数: 48

約数和(自身を含む): 60728640

約数和(自身を除く): 40589820

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 25819, 51638, 77457, 103276, 129095, 154914, 258190, 309828, 335647, 387285, 516380, 671294, 774570, 1006941, 1342588, 1549140, 1678235, 2013882, 3356470, 4027764, 5034705, 6712940, 10069410, 20138820]

約数ペア:

[(1, 20138820), (2, 10069410), (3, 6712940), (4, 5034705), (5, 4027764), (6, 3356470), (10, 2013882), (12, 1678235), (13, 1549140), (15, 1342588), (20, 1006941), (26, 774570), (30, 671294), (39, 516380), (52, 387285), (60, 335647), (65, 309828), (78, 258190), (130, 154914), (156, 129095), (195, 103276), (260, 77457), (390, 51638), (780, 25819)]