641744

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{2111}}^1$

素因数の和:2138

約数の個数: 20

約数和(自身を含む): 1309440

約数和(自身を除く): 667696

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 2111, 4222, 8444, 16888, 33776, 40109, 80218, 160436, 320872, 641744]

約数ペア:

[(1, 641744), (2, 320872), (4, 160436), (8, 80218), (16, 40109), (19, 33776), (38, 16888), (76, 8444), (152, 4222), (304, 2111)]