678320

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:213

約数の個数: 40

約数和(自身を含む): 1614480

約数和(自身を除く): 936160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 139, 244, 278, 305, 488, 556, 610, 695, 976, 1112, 1220, 1390, 2224, 2440, 2780, 4880, 5560, 8479, 11120, 16958, 33916, 42395, 67832, 84790, 135664, 169580, 339160, 678320]

約数ペア:

[(1, 678320), (2, 339160), (4, 169580), (5, 135664), (8, 84790), (10, 67832), (16, 42395), (20, 33916), (40, 16958), (61, 11120), (80, 8479), (122, 5560), (139, 4880), (244, 2780), (278, 2440), (305, 2224), (488, 1390), (556, 1220), (610, 1112), (695, 976)]