20652520

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{257}}^1$

素因数の和:323

約数の個数: 96

約数和(自身を含む): 55588680

約数和(自身を除く): 34936160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 49, 56, 70, 82, 98, 140, 164, 196, 205, 245, 257, 280, 287, 328, 392, 410, 490, 514, 574, 820, 980, 1028, 1148, 1285, 1435, 1640, 1799, 1960, 2009, 2056, 2296, 2570, 2870, 3598, 4018, 5140, 5740, 7196, 8036, 8995, 10045, 10280, 10537, 11480, 12593, 14392, 16072, 17990, 20090, 21074, 25186, 35980, 40180, 42148, 50372, 52685, 62965, 71960, 73759, 80360, 84296, 100744, 105370, 125930, 147518, 210740, 251860, 295036, 368795, 421480, 503720, 516313, 590072, 737590, 1032626, 1475180, 2065252, 2581565, 2950360, 4130504, 5163130, 10326260, 20652520]

約数ペア:

[(1, 20652520), (2, 10326260), (4, 5163130), (5, 4130504), (7, 2950360), (8, 2581565), (10, 2065252), (14, 1475180), (20, 1032626), (28, 737590), (35, 590072), (40, 516313), (41, 503720), (49, 421480), (56, 368795), (70, 295036), (82, 251860), (98, 210740), (140, 147518), (164, 125930), (196, 105370), (205, 100744), (245, 84296), (257, 80360), (280, 73759), (287, 71960), (328, 62965), (392, 52685), (410, 50372), (490, 42148), (514, 40180), (574, 35980), (820, 25186), (980, 21074), (1028, 20090), (1148, 17990), (1285, 16072), (1435, 14392), (1640, 12593), (1799, 11480), (1960, 10537), (2009, 10280), (2056, 10045), (2296, 8995), (2570, 8036), (2870, 7196), (3598, 5740), (4018, 5140)]