20806580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{907}}^1$

素因数の和:984

約数の個数: 48

約数和(自身を含む): 46373376

約数和(自身を除く): 25566796

約数列:

[1, 2, 4, 5, 10, 20, 31, 37, 62, 74, 124, 148, 155, 185, 310, 370, 620, 740, 907, 1147, 1814, 2294, 3628, 4535, 4588, 5735, 9070, 11470, 18140, 22940, 28117, 33559, 56234, 67118, 112468, 134236, 140585, 167795, 281170, 335590, 562340, 671180, 1040329, 2080658, 4161316, 5201645, 10403290, 20806580]

約数ペア:

[(1, 20806580), (2, 10403290), (4, 5201645), (5, 4161316), (10, 2080658), (20, 1040329), (31, 671180), (37, 562340), (62, 335590), (74, 281170), (124, 167795), (148, 140585), (155, 134236), (185, 112468), (310, 67118), (370, 56234), (620, 33559), (740, 28117), (907, 22940), (1147, 18140), (1814, 11470), (2294, 9070), (3628, 5735), (4535, 4588)]