27998425

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 44219392

約数和(自身を除く): 16220967

約数列:

[1, 5, 7, 13, 25, 31, 35, 65, 91, 155, 175, 217, 325, 397, 403, 455, 775, 1085, 1985, 2015, 2275, 2779, 2821, 5161, 5425, 9925, 10075, 12307, 13895, 14105, 25805, 36127, 61535, 69475, 70525, 86149, 129025, 159991, 180635, 307675, 430745, 799955, 903175, 1119937, 2153725, 3999775, 5599685, 27998425]

約数ペア:

[(1, 27998425), (5, 5599685), (7, 3999775), (13, 2153725), (25, 1119937), (31, 903175), (35, 799955), (65, 430745), (91, 307675), (155, 180635), (175, 159991), (217, 129025), (325, 86149), (397, 70525), (403, 69475), (455, 61535), (775, 36127), (1085, 25805), (1985, 14105), (2015, 13895), (2275, 12307), (2779, 10075), (2821, 9925), (5161, 5425)]