20182978

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:394

約数の個数: 32

約数和(自身を含む): 34128000

約数和(自身を除く): 13945022

約数列:

[1, 2, 17, 19, 34, 38, 157, 199, 314, 323, 398, 646, 2669, 2983, 3383, 3781, 5338, 5966, 6766, 7562, 31243, 50711, 62486, 64277, 101422, 128554, 531131, 593617, 1062262, 1187234, 10091489, 20182978]

約数ペア:

[(1, 20182978), (2, 10091489), (17, 1187234), (19, 1062262), (34, 593617), (38, 531131), (157, 128554), (199, 101422), (314, 64277), (323, 62486), (398, 50711), (646, 31243), (2669, 7562), (2983, 6766), (3383, 5966), (3781, 5338)]