21384405

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{397}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 46231680

約数和(自身を除く): 24847275

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 27, 35, 45, 57, 63, 81, 95, 105, 133, 135, 171, 189, 285, 315, 397, 399, 405, 513, 567, 665, 855, 945, 1191, 1197, 1539, 1985, 1995, 2565, 2779, 2835, 3573, 3591, 5955, 5985, 7543, 7695, 8337, 10719, 10773, 13895, 17865, 17955, 22629, 25011, 32157, 37715, 41685, 52801, 53595, 53865, 67887, 75033, 113145, 125055, 158403, 160785, 203661, 225099, 264005, 339435, 375165, 475209, 610983, 792015, 1018305, 1125495, 1425627, 2376045, 3054915, 4276881, 7128135, 21384405]

約数ペア:

[(1, 21384405), (3, 7128135), (5, 4276881), (7, 3054915), (9, 2376045), (15, 1425627), (19, 1125495), (21, 1018305), (27, 792015), (35, 610983), (45, 475209), (57, 375165), (63, 339435), (81, 264005), (95, 225099), (105, 203661), (133, 160785), (135, 158403), (171, 125055), (189, 113145), (285, 75033), (315, 67887), (397, 53865), (399, 53595), (405, 52801), (513, 41685), (567, 37715), (665, 32157), (855, 25011), (945, 22629), (1191, 17955), (1197, 17865), (1539, 13895), (1985, 10773), (1995, 10719), (2565, 8337), (2779, 7695), (2835, 7543), (3573, 5985), (3591, 5955)]