21751276

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 42336000

約数和(自身を除く): 20584724

約数列:

[1, 2, 4, 19, 29, 38, 58, 71, 76, 116, 139, 142, 278, 284, 551, 556, 1102, 1349, 2059, 2204, 2641, 2698, 4031, 4118, 5282, 5396, 8062, 8236, 9869, 10564, 16124, 19738, 39121, 39476, 76589, 78242, 153178, 156484, 187511, 286201, 306356, 375022, 572402, 750044, 1144804, 5437819, 10875638, 21751276]

約数ペア:

[(1, 21751276), (2, 10875638), (4, 5437819), (19, 1144804), (29, 750044), (38, 572402), (58, 375022), (71, 306356), (76, 286201), (116, 187511), (139, 156484), (142, 153178), (278, 78242), (284, 76589), (551, 39476), (556, 39121), (1102, 19738), (1349, 16124), (2059, 10564), (2204, 9869), (2641, 8236), (2698, 8062), (4031, 5396), (4118, 5282)]