208048575

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{20857}}^1$

素因数の和:20896

約数の個数: 48

約数和(自身を含む): 413822720

約数和(自身を除く): 205774145

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 95, 105, 133, 175, 285, 399, 475, 525, 665, 1425, 1995, 3325, 9975, 20857, 62571, 104285, 145999, 312855, 396283, 437997, 521425, 729995, 1188849, 1564275, 1981415, 2189985, 2773981, 3649975, 5944245, 8321943, 9907075, 10949925, 13869905, 29721225, 41609715, 69349525, 208048575]

約数ペア:

[(1, 208048575), (3, 69349525), (5, 41609715), (7, 29721225), (15, 13869905), (19, 10949925), (21, 9907075), (25, 8321943), (35, 5944245), (57, 3649975), (75, 2773981), (95, 2189985), (105, 1981415), (133, 1564275), (175, 1188849), (285, 729995), (399, 521425), (475, 437997), (525, 396283), (665, 312855), (1425, 145999), (1995, 104285), (3325, 62571), (9975, 20857)]