81993860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{315361}}^1$

素因数の和:315383

約数の個数: 24

約数和(自身を含む): 185432856

約数和(自身を除く): 103438996

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 315361, 630722, 1261444, 1576805, 3153610, 4099693, 6307220, 8199386, 16398772, 20498465, 40996930, 81993860]

約数ペア:

[(1, 81993860), (2, 40996930), (4, 20498465), (5, 16398772), (10, 8199386), (13, 6307220), (20, 4099693), (26, 3153610), (52, 1576805), (65, 1261444), (130, 630722), (260, 315361)]