21930255

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{263}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 40772160

約数和(自身を除く): 18841905

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 109, 153, 255, 263, 327, 545, 765, 789, 981, 1315, 1635, 1853, 2367, 3945, 4471, 4905, 5559, 9265, 11835, 13413, 16677, 22355, 27795, 28667, 40239, 67065, 83385, 86001, 143335, 201195, 258003, 430005, 487339, 1290015, 1462017, 2436695, 4386051, 7310085, 21930255]

約数ペア:

[(1, 21930255), (3, 7310085), (5, 4386051), (9, 2436695), (15, 1462017), (17, 1290015), (45, 487339), (51, 430005), (85, 258003), (109, 201195), (153, 143335), (255, 86001), (263, 83385), (327, 67065), (545, 40239), (765, 28667), (789, 27795), (981, 22355), (1315, 16677), (1635, 13413), (1853, 11835), (2367, 9265), (3945, 5559), (4471, 4905)]