20784865988

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{61}}^2\times {\mathrm{107}}^1\times {\mathrm{421}}^1$

素因数の和:685

約数の個数: 72

約数和(自身を含む): 38620737792

約数和(自身を除く): 17835871804

約数列:

[1, 2, 4, 31, 61, 62, 107, 122, 124, 214, 244, 421, 428, 842, 1684, 1891, 3317, 3721, 3782, 6527, 6634, 7442, 7564, 13051, 13054, 13268, 14884, 25681, 26102, 26108, 45047, 51362, 52204, 90094, 102724, 115351, 180188, 202337, 230702, 398147, 404674, 461404, 796111, 796294, 809348, 1396457, 1566541, 1592222, 1592588, 2747867, 2792914, 3133082, 3184444, 5495734, 5585828, 6266164, 10991468, 12342557, 24685114, 48562771, 49370228, 85183877, 97125542, 167619887, 170367754, 194251084, 335239774, 340735508, 670479548, 5196216497, 10392432994, 20784865988]

約数ペア:

[(1, 20784865988), (2, 10392432994), (4, 5196216497), (31, 670479548), (61, 340735508), (62, 335239774), (107, 194251084), (122, 170367754), (124, 167619887), (214, 97125542), (244, 85183877), (421, 49370228), (428, 48562771), (842, 24685114), (1684, 12342557), (1891, 10991468), (3317, 6266164), (3721, 5585828), (3782, 5495734), (6527, 3184444), (6634, 3133082), (7442, 2792914), (7564, 2747867), (13051, 1592588), (13054, 1592222), (13268, 1566541), (14884, 1396457), (25681, 809348), (26102, 796294), (26108, 796111), (45047, 461404), (51362, 404674), (52204, 398147), (90094, 230702), (102724, 202337), (115351, 180188)]