209990812

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{145423}}^1$

素因数の和:145465

約数の個数: 18

約数和(自身を含む): 387845808

約数和(自身を除く): 177854996

約数列:

[1, 2, 4, 19, 38, 76, 361, 722, 1444, 145423, 290846, 581692, 2763037, 5526074, 11052148, 52497703, 104995406, 209990812]

約数ペア:

[(1, 209990812), (2, 104995406), (4, 52497703), (19, 11052148), (38, 5526074), (76, 2763037), (361, 581692), (722, 290846), (1444, 145423)]