28178360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{641}}^1$

素因数の和:816

約数の個数: 64

約数和(自身を含む): 73033920

約数和(自身を除く): 44855560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 628, 641, 785, 1099, 1256, 1282, 1570, 2198, 2564, 3140, 3205, 4396, 4487, 5128, 5495, 6280, 6410, 8792, 8974, 10990, 12820, 17948, 21980, 22435, 25640, 35896, 43960, 44870, 89740, 100637, 179480, 201274, 402548, 503185, 704459, 805096, 1006370, 1408918, 2012740, 2817836, 3522295, 4025480, 5635672, 7044590, 14089180, 28178360]

約数ペア:

[(1, 28178360), (2, 14089180), (4, 7044590), (5, 5635672), (7, 4025480), (8, 3522295), (10, 2817836), (14, 2012740), (20, 1408918), (28, 1006370), (35, 805096), (40, 704459), (56, 503185), (70, 402548), (140, 201274), (157, 179480), (280, 100637), (314, 89740), (628, 44870), (641, 43960), (785, 35896), (1099, 25640), (1256, 22435), (1282, 21980), (1570, 17948), (2198, 12820), (2564, 10990), (3140, 8974), (3205, 8792), (4396, 6410), (4487, 6280), (5128, 5495)]