21818225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{359}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 33747840

約数和(自身を除く): 11929615

約数列:

[1, 5, 11, 13, 17, 25, 55, 65, 85, 143, 187, 221, 275, 325, 359, 425, 715, 935, 1105, 1795, 2431, 3575, 3949, 4667, 4675, 5525, 6103, 8975, 12155, 19745, 23335, 30515, 51337, 60775, 67133, 79339, 98725, 116675, 152575, 256685, 335665, 396695, 872729, 1283425, 1678325, 1983475, 4363645, 21818225]

約数ペア:

[(1, 21818225), (5, 4363645), (11, 1983475), (13, 1678325), (17, 1283425), (25, 872729), (55, 396695), (65, 335665), (85, 256685), (143, 152575), (187, 116675), (221, 98725), (275, 79339), (325, 67133), (359, 60775), (425, 51337), (715, 30515), (935, 23335), (1105, 19745), (1795, 12155), (2431, 8975), (3575, 6103), (3949, 5525), (4667, 4675)]