640207318

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{683}}^1\times {\mathrm{1451}}^1$

素因数の和:2172

約数の個数: 32

約数和(自身を含む): 1072621440

約数和(自身を除く): 432414122

約数列:

[1, 2, 17, 19, 34, 38, 323, 646, 683, 1366, 1451, 2902, 11611, 12977, 23222, 24667, 25954, 27569, 49334, 55138, 220609, 441218, 468673, 937346, 991033, 1982066, 16847561, 18829627, 33695122, 37659254, 320103659, 640207318]

約数ペア:

[(1, 640207318), (2, 320103659), (17, 37659254), (19, 33695122), (34, 18829627), (38, 16847561), (323, 1982066), (646, 991033), (683, 937346), (1366, 468673), (1451, 441218), (2902, 220609), (11611, 55138), (12977, 49334), (23222, 27569), (24667, 25954)]