81271925

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 121135104

約数和(自身を除く): 39863179

約数列:

[1, 5, 7, 25, 31, 35, 71, 155, 175, 211, 217, 355, 497, 775, 1055, 1085, 1477, 1775, 2201, 2485, 5275, 5425, 6541, 7385, 11005, 12425, 14981, 15407, 32705, 36925, 45787, 55025, 74905, 77035, 104867, 163525, 228935, 374525, 385175, 464411, 524335, 1144675, 2322055, 2621675, 3250877, 11610275, 16254385, 81271925]

約数ペア:

[(1, 81271925), (5, 16254385), (7, 11610275), (25, 3250877), (31, 2621675), (35, 2322055), (71, 1144675), (155, 524335), (175, 464411), (211, 385175), (217, 374525), (355, 228935), (497, 163525), (775, 104867), (1055, 77035), (1085, 74905), (1477, 55025), (1775, 45787), (2201, 36925), (2485, 32705), (5275, 15407), (5425, 14981), (6541, 12425), (7385, 11005)]