20685525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 41372352

約数和(自身を除く): 20686827

約数列:

[1, 3, 5, 7, 15, 21, 25, 31, 35, 41, 75, 93, 105, 123, 155, 175, 205, 217, 287, 465, 525, 615, 651, 775, 861, 961, 1025, 1085, 1271, 1435, 2325, 2883, 3075, 3255, 3813, 4305, 4805, 5425, 6355, 6727, 7175, 8897, 14415, 16275, 19065, 20181, 21525, 24025, 26691, 31775, 33635, 39401, 44485, 72075, 95325, 100905, 118203, 133455, 168175, 197005, 222425, 275807, 504525, 591015, 667275, 827421, 985025, 1379035, 2955075, 4137105, 6895175, 20685525]

約数ペア:

[(1, 20685525), (3, 6895175), (5, 4137105), (7, 2955075), (15, 1379035), (21, 985025), (25, 827421), (31, 667275), (35, 591015), (41, 504525), (75, 275807), (93, 222425), (105, 197005), (123, 168175), (155, 133455), (175, 118203), (205, 100905), (217, 95325), (287, 72075), (465, 44485), (525, 39401), (615, 33635), (651, 31775), (775, 26691), (861, 24025), (961, 21525), (1025, 20181), (1085, 19065), (1271, 16275), (1435, 14415), (2325, 8897), (2883, 7175), (3075, 6727), (3255, 6355), (3813, 5425), (4305, 4805)]