20385975

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 36426240

約数和(自身を除く): 16040265

約数列:

[1, 3, 5, 15, 17, 25, 51, 59, 75, 85, 177, 255, 271, 295, 425, 813, 885, 1003, 1275, 1355, 1475, 3009, 4065, 4425, 4607, 5015, 6775, 13821, 15045, 15989, 20325, 23035, 25075, 47967, 69105, 75225, 79945, 115175, 239835, 271813, 345525, 399725, 815439, 1199175, 1359065, 4077195, 6795325, 20385975]

約数ペア:

[(1, 20385975), (3, 6795325), (5, 4077195), (15, 1359065), (17, 1199175), (25, 815439), (51, 399725), (59, 345525), (75, 271813), (85, 239835), (177, 115175), (255, 79945), (271, 75225), (295, 69105), (425, 47967), (813, 25075), (885, 23035), (1003, 20325), (1275, 15989), (1355, 15045), (1475, 13821), (3009, 6775), (4065, 5015), (4425, 4607)]