21260525

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 32706240

約数和(自身を除く): 11445715

約数列:

[1, 5, 11, 13, 19, 25, 55, 65, 95, 143, 209, 247, 275, 313, 325, 475, 715, 1045, 1235, 1565, 2717, 3443, 3575, 4069, 5225, 5947, 6175, 7825, 13585, 17215, 20345, 29735, 44759, 65417, 67925, 77311, 86075, 101725, 148675, 223795, 327085, 386555, 850421, 1118975, 1635425, 1932775, 4252105, 21260525]

約数ペア:

[(1, 21260525), (5, 4252105), (11, 1932775), (13, 1635425), (19, 1118975), (25, 850421), (55, 386555), (65, 327085), (95, 223795), (143, 148675), (209, 101725), (247, 86075), (275, 77311), (313, 67925), (325, 65417), (475, 44759), (715, 29735), (1045, 20345), (1235, 17215), (1565, 13585), (2717, 7825), (3443, 6175), (3575, 5947), (4069, 5225)]