638346320

素因数分解:

$2^4\times 5^1\times {\mathrm{2789}}^1\times {\mathrm{2861}}^1$

素因数の和:5663

約数の個数: 40

約数和(自身を含む): 1485206280

約数和(自身を除く): 846859960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2789, 2861, 5578, 5722, 11156, 11444, 13945, 14305, 22312, 22888, 27890, 28610, 44624, 45776, 55780, 57220, 111560, 114440, 223120, 228880, 7979329, 15958658, 31917316, 39896645, 63834632, 79793290, 127669264, 159586580, 319173160, 638346320]

約数ペア:

[(1, 638346320), (2, 319173160), (4, 159586580), (5, 127669264), (8, 79793290), (10, 63834632), (16, 39896645), (20, 31917316), (40, 15958658), (80, 7979329), (2789, 228880), (2861, 223120), (5578, 114440), (5722, 111560), (11156, 57220), (11444, 55780), (13945, 45776), (14305, 44624), (22312, 28610), (22888, 27890)]