20113780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1291}}^1$

素因数の和:1360

約数の個数: 48

約数和(自身を含む): 45581760

約数和(自身を除く): 25467980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 1291, 1558, 2582, 3116, 3895, 5164, 6455, 7790, 12910, 15580, 24529, 25820, 49058, 52931, 98116, 105862, 122645, 211724, 245290, 264655, 490580, 529310, 1005689, 1058620, 2011378, 4022756, 5028445, 10056890, 20113780]

約数ペア:

[(1, 20113780), (2, 10056890), (4, 5028445), (5, 4022756), (10, 2011378), (19, 1058620), (20, 1005689), (38, 529310), (41, 490580), (76, 264655), (82, 245290), (95, 211724), (164, 122645), (190, 105862), (205, 98116), (380, 52931), (410, 49058), (779, 25820), (820, 24529), (1291, 15580), (1558, 12910), (2582, 7790), (3116, 6455), (3895, 5164)]