20788425

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1$

素因数の和:287

約数の個数: 72

約数和(自身を含む): 43407936

約数和(自身を除く): 22619511

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 67, 75, 105, 175, 197, 201, 225, 315, 335, 469, 525, 591, 603, 985, 1005, 1379, 1407, 1575, 1675, 1773, 2345, 2955, 3015, 4137, 4221, 4925, 5025, 6895, 7035, 8865, 11725, 12411, 13199, 14775, 15075, 20685, 21105, 34475, 35175, 39597, 44325, 62055, 65995, 92393, 103425, 105525, 118791, 197985, 277179, 310275, 329975, 461965, 593955, 831537, 989925, 1385895, 2309825, 2969775, 4157685, 6929475, 20788425]

約数ペア:

[(1, 20788425), (3, 6929475), (5, 4157685), (7, 2969775), (9, 2309825), (15, 1385895), (21, 989925), (25, 831537), (35, 593955), (45, 461965), (63, 329975), (67, 310275), (75, 277179), (105, 197985), (175, 118791), (197, 105525), (201, 103425), (225, 92393), (315, 65995), (335, 62055), (469, 44325), (525, 39597), (591, 35175), (603, 34475), (985, 21105), (1005, 20685), (1379, 15075), (1407, 14775), (1575, 13199), (1675, 12411), (1773, 11725), (2345, 8865), (2955, 7035), (3015, 6895), (4137, 5025), (4221, 4925)]