20761520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19963}}^1$

素因数の和:19989

約数の個数: 40

約数和(自身を含む): 51986256

約数和(自身を除く): 31224736

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19963, 39926, 79852, 99815, 159704, 199630, 259519, 319408, 399260, 519038, 798520, 1038076, 1297595, 1597040, 2076152, 2595190, 4152304, 5190380, 10380760, 20761520]

約数ペア:

[(1, 20761520), (2, 10380760), (4, 5190380), (5, 4152304), (8, 2595190), (10, 2076152), (13, 1597040), (16, 1297595), (20, 1038076), (26, 798520), (40, 519038), (52, 399260), (65, 319408), (80, 259519), (104, 199630), (130, 159704), (208, 99815), (260, 79852), (520, 39926), (1040, 19963)]