21638260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1217}}^1$

素因数の和:1360

約数の個数: 48

約数和(自身を含む): 52383744

約数和(自身を除く): 30745484

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1217, 1270, 1778, 2434, 2540, 3556, 4445, 4868, 6085, 8519, 8890, 12170, 17038, 17780, 24340, 34076, 42595, 85190, 154559, 170380, 309118, 618236, 772795, 1081913, 1545590, 2163826, 3091180, 4327652, 5409565, 10819130, 21638260]

約数ペア:

[(1, 21638260), (2, 10819130), (4, 5409565), (5, 4327652), (7, 3091180), (10, 2163826), (14, 1545590), (20, 1081913), (28, 772795), (35, 618236), (70, 309118), (127, 170380), (140, 154559), (254, 85190), (508, 42595), (635, 34076), (889, 24340), (1217, 17780), (1270, 17038), (1778, 12170), (2434, 8890), (2540, 8519), (3556, 6085), (4445, 4868)]